Hello, basically my problem is this...I'm 21, and have had irregular periods since they started aged 11. I used to go about two months without one. Every once in a while I would have some sort of regular cycle but it wouldn't last long. Now all of a sudden I haven't had one in 7 months, my longest gap yet! It will sometimes feel like I'm almost having an invisible period - I get cramps and mood swings but that's it. No spotting or anything. I am, however, noticing myself gain weight like crazy. I'm also not pregnant and have never used any contraception other than condoms in my life. I have visited my gyno a few times and been tested for hormone levels, poly cystic ovaries etc, had cameras and ultra sounds in the past and nothing has ever came up. My main worry now is if this is a problem concerning fertility other than anything else :( I'm at my wit's end because I still haven't really got an answer. If anyone has experienced anything similar and has had some sort of diagnosis/treatment to deal with this I would greatly appreciate any advice! Thank you :)