Wondering if I should test?

My period was 5 days late and when it finally came it was super light. My flow is normally on the heavy side and stayed that way even after I started my birth control. Normally there are big clumps of blood I’m guessing part of my uterus but nothing this time. I’m wondering if it is possible to be pregnant and if I should test? My boyfriend and I never use condoms because I’m on the pill and I was ovulating when we had sex.