To Test or Not To Test

So last month, me and my husband were convinced I was pregnant. Took a test and I was neg. Then I started my "period". It was really light and only about 2 days which is exact opposite of my periods normally. I thought it was weird but I didn't retest. Well, on top of what we thought were symptoms last month, I'm having what could be symptoms again. We have had unprotected sex a few times since my period. Should I wait and see if I'm late and then test or just go ahead and test and see what happens..?