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 eve 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 :)