help plz

So heres the thing. Im 12 days late on my period. Iv been trying to get preggo for over 1 year. But last month i was 10 days late then had my period. Month before 6 days late. So my question is how do i know if im preggo without taking the test. Or how long should i wait. I dont wanna get my hopes up then be sad again. For 3 days iv been getting like period cramps just no period. Heeeelllllpppp plz