Should I blood test?

Autumn

My period normally always comes on the day glow predicts maybe like a day early. I went back and counted and it’s always about 20-23 days because between each period. I haven’t started yet and I took a test yesterday and it was negative. I am tried of buying tests. It gets so expensive! I called my doctor and I can do a blood test but should I wait a couple more days? I have been feeling off like super wet(sorry tmi) and I am peeing like every 15-20 mintues. So I have no idea what is going on 🤷🏻‍♀️