Period Symptoms, but no blood?

hi , i know what you are going through! I am also going through period problems as well , really confusing ones, always wondering if i ever will get one again in my life..i know doctors have told me you can still have your period even if you have no blood showing , just get a bunch of tests done if you see that your not obese and you are not having problems with your ovaries or anything , id say everything should be fine...now about my problem i am 25 years old and i have not had a period since i was at least 15 or 16 years old, i am obese tho i am overweight , some times itake in my mind that its just my weight stopping it from coming, but on the other hand what drives me more crazy is when i see woman that are more bigger than me and have their normal periods and have kids, im married i make love with my husband , i never see a result of pregnancy im worried ill never be able to have kids wit him , any advice about what might be wrong fo rme