Ano po Ito hope someone notice this

Plan to visit to OB but I need to ask here what is this po? Since we do the deed with my fiancee, I experiencing this, got it on my private part, akala ko po dahil sa trust pills, kaya nag stop ako, fiancee is not here and yet merun pa din po. iS this Sex Transmitted Infection (STI), nahihiya among itanong kay fiancee, sya po ung 1st ko.