Has anyone had something like this happen?

Ok, so on Sept. 11th i had my last normal period. I had w/ my bf on sept. 26th.[the day i ovulated] then a week later i had preg. symptoms. i even fainted/ped out. then on the day my period was supposed to start oct 10 i started bleeding but it was brown & pink w/ a lil red. it only lasted 3.5/4 days when it's usually 5-7. so then the bleeding stopped and i still had all the same preg. symptoms +more. then my next period was due nov. 8th. i didnt start bleeding until the 12th. it's like brownish red. this is my 2nd almost 3rd day of bleeding and my bf and i both noticed the last couple of days that my have gotten bigger and there's a vein poppin out on each of them & they're sore when they touch anything. i still have all the symptoms, but i've tested 4 times altogether and they were all neg. is it possible for me to still be prego & bleeding & not showing up prego on hpt's?? my mom told me that she had problems with showing up + on hpt's when she was prego all 3 times. she had to get blood tests to proove it. and she fainted before she found out that she was prego w/ my twin sisters & then didnt show up + on a hpt. all of this has me so confused. i'll accept it either way, prego or not, but its killing me not knowing. i know all of the tests say no but my body and my mind keep saying i am. i've had soooo many symptoms: nausea on & off everyday, sore s & theyre bigger, peeing alot, fatigue like crazy!!, certain smells make me sick, mood swings, i had a cold w/ lots of congestion, stuffy nose, frequent headaches, my body feels warmer all the time, i'm more gy than usual, i've had some pimples recently & I NEVER get pimples, and i just noticed today that my stomach is poochin out a LITTLE bit in my pubic area..i'm pretty small so of course i notice when anything looks different and it def. does! & i've even had the 1 random hiccup that i've heard so many pregnant ladies saying they have/had! idk if i am prego but if i am then i would be 9w1d. today is my birthday and it sucks not really knowing cuz if i drink or smoke i'm gonna feel quilty. like everytime i smoke a cig. my stomach turns and i feel like i shouldn't. =/ someone plz tell me what u think or if u know what could be wrong with me!! thank u sooo much! <33 =]