Why is this happening ..ladies with babies answer pls!!!

Okay when I was about 11 1/2 weeks pregnant doctor told me I had a miscarriage cause he couldnt see the baby I was so upset cause they didnt check for a heartbeat or nothing. they said maybe I lost it at 2 or three weeks cause for some odd reason I didnt have any cramping or bleeding…I was like what if I lost it then my body shouldnt have kept on changing right…but the dumb asses couldnt explain why my body was still changing oh yeah and they said my blood test came out negative and my urine was positive but since my blood was neg. Then there is no way im pregnant ..so I went home thinking I lost the baby…so many mixed emotions…okay like 3 1/2 weeks later when I would be like 14 1/2 weeks I started to get lil dots of white and clear liquid come out of my breast and I was like holy crap and I looked it up and they said it would be my beast getting ready to develop milk some woman leak a lil and some dont I know that..but I was thinking hey they said I wasnt pregnant..so forget it I left it alone well this continue for a whole month everytime I would squeeze it I would get lil dots of the stuff. Okay its been a lil while now and if im pregnant I should be 20 weeks now and around like 18 to 19 weeks I started to feel like lil popping in my stomach it felt like pop corn popping you know..and now officially I cant lay on my stomach no more I get so nauesated if I do and I have gained like 10 pounds since the beginning…everyone still says it looks like im getting bigger and pregnant..oh yeah I still havent had a damn period…im scared to go to the doctor but I know I have to…