Should I test?

Hey so here it goes,So I’m in a new relationship for 3 months now and the guy I’m with have five kids didn’t know that when we starting to go out ,He told me first he had two kids,We we’re having save sex until we did a STD Check and all come back negative,Anyway he think I might be pregnant because he cum in me couple weeks ago and I had spotting couple days on the due date my period was due,but I have pcos so it’s normal for me to miss a period,Should you guys think I should test?