advice

i recently started bleeding after sex/ fingering. it’s been 2 days and the bleeding has been really light the whole time but im concerned. my period ended about a day or 2 prior to the sex. im concerned i might have an sti or something but another part of me thinks i don’t just bc the sex was rough and it could just be an injury. but light bleeding for days could mean sti wherever i read. should i get tested or wait a little while longer?