sometimes periods come late.taking birth control can help get them back to once a month.

also you should probably dump him since he doesnt believe you even though youve shown him proof.

1) Your boyfriend is a complete tool. His reaction is childish, immature and way over the top. Even with proof he's still acting this way which is even more unacceptable, it sounds like very untrusting and controlling behavior. If it were me, I wouldn't put up with it and I'd leave, but if you don't want to do that, have a very serious talk about his behavior. Harassing your exes is especially inappropriate. and 2) periods are weird, they can get messed up with even the slightest change in your body. Even changes in diet and/or exercise routines can mess up their schedule. I once got mine for a month and a half straight because of a significant loss in weight. Go to the doctor, make sure there isn't anything more serious going on, they might even recommend something to help. Since your boyfriend is so unreasonable, get them to also do a pregnancy check, if he doesn't believe the doctor, then he's a total loss and an idiot at which point I'd move on.

so, I literally just started my period after not being on it for ten months. I just got back from attempting to join the Army though, but for sure, periods are all ****** up.

What a tool...

You can either end this relationship or spend the rest of it defending everything you do, for both your safety and sanity get out asap.

Ask your mom to take you to your gyno.

Insecure to that extent is a bad thing.

if you're obese or have a low body fat content then that can seriously effect your hormone cycles. i think the minimum you need to have is 15%. no idea at what point out starts messing up on the top end though.