Okay I'm 18 and about two months ago i was on my period for over a month, and ever since then during after sex i bleed as if i was on my period and its HORRIBLE. Anyways this also happens even when i don't have sex, it's very painful and most of the time i can't move, and i feel very sick.
Everyday since then also i have gained almost 10lbs, have weird appetites,
and feel very nauseated, i have very bad mood swings and am very emotional.
Like I said this all started two months ago.
I am on the birth control Seasonique and have been since me and my boyfriend have been having sex and that's been for the last 2years. I know i don't have an STD or anything. I have been to the doctors too see if we can find out whats going on, they did a pelvis x ray, blood tests, and urine test and found nothing wrong and yet this is still happening and I'm in alot of pain.
If anyone has had the same or similar happen or going on please help i need answers please.

or advise or something someone help I'm losing it.