Hi, I think I’m pregnant I bled since Feb 2nd

Patient: Hi, I think I’m pregnant. I bled since Feb 2nd and finally brown and scarce today(7th) but I think it’s implantation bleeding. It took a day and a half extra to flow like a regular period and that has never happened-ever. It was a little watery too. I also feel sick in the pit of my stomach but haven’t eaten since last night’s salad. I also feel twinges in my stomach every now and for the past couple weeks. My pregnancy test was negative this morning so please advise. Thanks