Question for all moms out there.

So obviously I know there is a chance that I could be pregnant, my husband and I never use protection. We always say if it happens then it's meant to be, if not it will someday. So if I am it's not a bad thing (I actually want a baby so bad) but anyways the last two or three days I've had a terrible back ache, cramps and I've had weird discharge and spotting off and on. I'm going to buy a test to double check but I was just wondering if any of you ladies had this when you found out you were pregnant? According to the <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a> app I'm supposed to be ovulating this week but idk how accurate that is. I'm not looking for snotty remarks like "just buy a test" I'm simply asking if anyone else has experienced this. Thanks :)