period while pregnant

Ry
I'm not actively ttc, I have a 9 month old, so me and my SO use a condom whenever we have sex. We haven't had sex since march 17th due to a short separation, but we're back together now & in couples therapy. Anyways, I had a regular period 4 days later. My periods are always the same. 4 days of light spotting, no cramps or other symptoms. It felt regular so I figured I was good especially since we used a condom. Now I'm late for my period but I didn't worry until he told me he doesn't think we actually used a conform that night. He said we ran out before that night but I could swear I saw him open one. So now neither of us remember since it's been so long. I thought I had a regular period? But my cycles are always the same, how on earth am I 5 days late? I have yet to test. I'm kinda nervous to test to be honest. I'm just wondering if anyone's had what seems like a normal period & still been pregnant? He's got me wiggin out.