Not worth taking a pregnancy test right?

Al

My period is due in 3 days. A few days ago I started getting light cramps every once in a while. Usually my cramps are very painful and all the time. This is the only thing giving me “hope” that there’s a chance I could be pregnant.. some months I spot before starting and some months it just hits me. I should be starting Saturday.. if Sunday rolls around and I don’t get it should I spend $12 on a pregnancy test?

UPDATE: POSITIVE!!