On Birth Control But Yet, May Be Pregnant...Am I?

I have read a lot of stuff online..and most say to take the pregnancy test. Well i haven't been anywhere to get one..and i work around the clock. I do have an appointment on monday, but if i could possibly get some kind of response to this..it'd set my mind at ease.
I am on the pill...i miss'd one 2 days ago..but recieved my period right after..the next day of course. Normally if i miss a pill it dunt come that quickly. According to my pills, i am not due for my period for another week and a half. So that has my mind in a twizzle.
For almost 3 weeks i have been fighting off terrible headaches. Headaches that come and put me right to sleep...i can't function. I'm tired all the time, i can't sleep well at night, i'm weak sometimes, i have backaches, upset stomachs pretty much everyday, not jes in the morning. I have dizziness, leg cramping, so bad, like charlie horses all the time. I have bright yellow urine..time to time...kinda cloudy. dunno if that's anything but yew jes never kno. Lately i been finding that my stomach has been hav'n pressure...like when i get up outta bed, mah stomach is like...well..theres pressure in my stomach. Or at work, when i'm walkn around it comes on again..pressure in my stomach. Also, i had one pickle the other day cause it looked so good, and i ate like 5 after lol..and then today...i had this huge Fruit craving..and i'm not a huge fruit fan, i dunt buy fruit, im not a fruit eatter...so today, after work, i buy cantaloupe, watermelon, apples and bananas...i ate half a cantoloupe, 4 pieces of melon, 1 apple and one banana..it was one huge plate of fruit...but it satisfied me, i wanted more. It was juicey and runny and sweet, jes how i craved it. its weird.
I jes wonder wots go'n on with my body, so if any of yew have an idea..please feel free to share!
Thank yew!