Am i having blood sugar issues? I became all jittery, hungry and cold

You need to balance the carbs with protein. If you have a high carb snack you can get a surge of insulin to control the increased blood sugar then a rebound low sugar. Eating a carb/sugar will bring you sugar level up quickly, but adding the protein will maintain your levels and prevent the rebound. I'm sure rolling rock could explain this all better than I can.
I had problems with low blood sugar when I was pregnant, and I found a snack like crackers with some cheese helped a lot.

Listen to Kattzoo... chocolate deficit. I spotted it right away.

agree with CB....the bananas and Apples have lots of sugar and you have to be careful with carbs--there are low glycemic carbs and high glycemic carbs. I couldn't help you to identify which is which--as I got my levels to normal with 5 meals a day. By eating almost constantly your body can keep the sugar level. I would guess you need to put more protein and fat in your diet.

Beef jerky??????

also........I DO NOT carbo-load before races......even marathons. I really think most people do not need to and some of us probably shouldn't. I've actually had my best performances when I don't eat the night before. ????
(I probably have enough fat stores)

John I would keep some GU or some type of gel that would give a real shot of carbs. The veggies and stuff are not a quick enough response.

PH - your metabolism is in high gear. your insulin output is higher than your carb intake over the long haul. (say, 24 hour period) You may be out of balance at this point; your pancreas is really fine tuned to any carb that enters your system - rush of insulin.

like CB said -- protein with the carb will spread that "high" out over a longer period of time. the protein WITH the carb slows the digestion process; fat and protein take longer to digest. Pizza is a great example..the fat and cheese on the pizza keep the carbo blast from spiking your sugar level up, it is more of a plateau effect.

as far as glucose tablets go, an adult would need 4 tablets to effectively treat a "low". my son hates them. try getting a low teenager to chew 4 of those chalky things down against his will......

i will take one if my mouth is dry during a run but to raise your glucose to a safe level, you would need at least 4 to be safe.

little 4 oz juicy juice boxes are perfect for treating a low if you feel like carrying that on the bike. (they can burst or crack and leak :x ) gel or gu is best. also, Cake-Mate little cake icings are good too but ALWAYS try to take a protein/carb snack after you gel or you'll be right back to the high spike, low cycle.....) Peanut butter 4 pack crackers are the best.

Chocolate milk! (Good protein to carb ratio)

I will tell anyone who is even more genetically prone  to fast sugar lows to lay off banana's, my and my family are just more susceptible to sugar lows especially when we are tired, happens really fast and we get super cranky until we get a bit of chocolate or a biscuit, bananas tend to make me shaky because of their high natural sugar content, they are the worst, same for apples, a lot of sugar in them, if you have a banana only eat half, same for apples but don't eat them on the same day and only half an apple or banana every now and then, sometimes i get a hankering for a banana a juicy apple so i would just eat it then, but the rest of the time stay away from them, also peanutbutter does have sugar so id not eat that every day ether, again just when you get a craving for it, i get cravings for peanutbutter at least once every 2 maybe 3 weeks lol, and start with something light for your breakfast but nothing sugary, if you need some sugar stick to just your sugar in your coffee and some chocolate or 1 or 2 biscuits, that's enough daily intake for sugar, i had a coffee and then i just had a penguin and a caramel wafer biscuit :P good enough for me. If you eat ice cream instead of chocolate cut it in in quarters and only eat a quarter but try not to eat ice cream every day ether.