what are the symptoms of an STI

no fuss, no hate please. i have a new partner. i asked him if he was tested regularly and he said yes and his results came back negative however he didn’t show me proof. my dumb ass was just in the heat of the moment and we did it of course a few times and ever since then i’ve been feeling crampy.. i made an appointment to get tested monday. he is on the bigger side, and we’ve been rough and idk if that’s why i’ve been crampy. my discharge is normal, no smell..

can cramping be a symptom of an STI