Negative Test, Period, But I Know Its A Baby In There.!!!

Patient: Since august i noticed a change in my period. very light(pink), barely filling a pad. three days long with only cramping on the first day. i also got red jelly almost like little spots in my pad. usually i get a period every 28 days, for four days, and cramping for the whole time. my flow is usually heavy the first two days then lightens. since then i noticed a lot more trips to the bathroom, no matter how much pee comes out, its always a strong urge to go. im also gassy and burppy. along with that my eating has change im suddenly always feeling the need to eat, hen when i get my food i lose the taste for it, and end up not eating sometimes. after i eat i sometimes get a nasty taste in my mouth like throw up. my chest is getting larger and darker with bumps around the nipple. their also way more sensitive to touch. i know its weird but for some reason my belly button is getting wider and like it wants to pop out at times. i have gained weight but only in my stomach. my pants fit okay, but when i sit down now my waist band bothers me. i can fall asleep anytime during the day but at night i cant seem to fall asleep. sleeping on my side is comfortable but on my stomach hurts. the big thing is i feel movement especially when i move a lot(i do get winded faster). am i pregnant i have took plenty of hpt and all negative, my ultrasound showed an enlarged uterus.

Doctor: