Ovulation test for testing pregnancy?

Ok I know it’s not the same but I have no pregnancy tests and haven’t been able to get to the store so I tried a ovulation test a couple nights ago and the test line was pretty dark then I tested tonight and it was darker then it was the other night. AF is due in 6 days so I’m not sure why my LH would be rising now, and i had a few days of off and on spotting 6 days after sex. Any thoughts? This is really making my mind wonder!!