Hi, My Last Period Was December 13th, And My Husband

Hi, my last period was December 13th, and my husband and I had sex Dec 26th in which I started bleeding for about 2 hours it went from bright red and faded to pink til it stopped completely. I was due to start again January 7th and on January 16th we had sex and it was a bit painful like something in my stomach was being hit. Well I am currently 16 days late and I have fatigue, constant urination, my breast are heavy and are leaking a milk type liquid, back pain, possible bloating, and the muscles in my stomach are harder than normal, I took 2 pregnancy test, the first January 18th (in the afternoon) and it was negative and then I took another one January 20th (in the evening) and it was negative. At this point I don't know if I'm pregnant or if something is wrong with me