To test, or not to test....

Amber

Looking for opinions! My husband and I had "me and you time" 3 weeks ago when Glow showed an 11% chance of pregnancy. Fast forward to last week, my period was two days late but did eventually come, however, I'm usually stuck with a heavy flow and this was more in between spotting and light flow. I am 11 months postpartum with my exclusively breastfed baby and this is only my second "period" since her birth. First one was normal, this one has not been. So just a wacked out period, or pregnancy spotting? Thoughts?