depo!!! help!!!

i have to ask something. yes i screwed up but don’t try to tell me i shouldn’t have done it. i’m here for advice not to get criticized. so i had an iud for about 6 months but my body rejected the iud and the doctor and me both decided on the depo shot because he has never seen anyone in his office get pregnant with the shot and he told me to wait 5 days before i had sex. well me and my boyfriend didn’t listen and had sex 4 days after the shot and he came in me. it’s been 37 days since i’ve had a period and i took a test about 3 days ago and it came out negative. yesterday i was spotting very light just barely able to notice but spotting is a sign of pregnancy and the shot could’ve just changed my period to spotting because that’s one of the effects. just wanting some advice or help.