Feeling scared...

AF is due in 5 days, I’ve had cramping and a little bit of nausea, feels like PMS symptoms to be honest only the cramping started last week and felt a little sharper, like a stabbing pain. I do suffer from ovarian cysts though so It could be that. This is so stressful and I know if AF comes on time as she is usually punctual as hell im going to be really gutted. How do you bounce back and try again without feeling hurt and disappointed every time?