Had my IUD removed & now problems

I had my IUD removed (Mirena) way back in November or maybe even October, I had a c-section with my first daughter & I even got pregnant with her on the pill (never missed a day or anything) I didn't have my period on the IUD (spotting once in a blue moon) & of course everything went back to normal by December (we started trying as soon as the IUD came out after getting the go ahead) but come February my period would start on the "last day" of my period so I keep getting my hopes up so we have stopped trying but today was supposed to be the last day of my period & still nothing, no symptoms though (but I was 3months with my daughter before I even got a positive test) should I get my hopes up & take a test?! Does anyone else have this problem?! Could it be stress (we just laid my grandpa to rest last week maybe it's stress?)