It's time to do the happy dance

I go months and months without periods, of course the second I realize I'm late i test, even if I don't suspect that I am. I took a test last month and it was negative.. But seriously this happens everytime. Time goes on, no period in sight. I start to wonder if I'll be one of those moms on "I didn't know I was pregnant" and then just randomly give birth one day. I woke up today and went to the bathroom and took off my clothes to hop in the shower and I saw blood on my panties. I seriously did a naked happy dance and then hit my hand on the door and yelled OW and my SO was like "um are you okay?"