Bfs cancer in remission. Where is my red friend?

So i usually spot 5 or so days before my period. The guy im seeing has testicular cancer and is in remission for 5 yrs now and hes not sure if he can have kids (hes talking to his dr about getting his boys checked- had chemo, radiation and one ball removed). Anywho, he came inside me maybe 2 days after my period ended last month. And i believe it was my first or second day of ovulation and he came in me (maybe about half) and pulled out. Im not on birth control. Im 2 days late... no spotting whatsoever which is very weird for me. And no cramping. Should i test...?