Pregnancy symptoms ?

I usually eat A LOT but lately I just feel like throwing up halfway through eating. It’s been like that for a few days now and with anything I eat. Even if I haven’t ate anything, I feel like throwing up after eating something. Yesterday, I noticed light blood when I wiped & I thought maybe it was implantation bleeding. The last time I had unprotected sex, it was a day after my period. My bf only did it for about 2 minutes & then put on a condom, lasted about 5 more minutes and came. I took a pregnancy test yesterday & it was negative. Idk what else to do because Idk what else it could be ☹️