new pregnancy? 7 weeks pp

i don’t need the lectures. i know what i did was wrong, and not safe for my own health. incredibly dumb and foolish. save me the hate i’ve given myself plenty. but, i started having sex at 3-4 weeks pp, and even more awful my partner didn’t pull out any of those times. i know i was wrong so i took a pregnancy test at around 10pm today after drinking about 90oz of water (im breastfeeding) and about a 2-3 hr hold. i got a very faint line. is this hcg from my recent pregnancy and birth??? or is this likely a new pregnancy and i should be calling my doctor? please spare me but i would like some opinions. the information on the internet is somewhat conflicting on if this is remaining hcg from my most recent pregnancy or if this could be from a new pregnancy. help me please.