Chances I’m pregnant?

Had sex 5 days before ovulation without protection, 2 days before ovulation (pull out method used) and we had sex 2 days after ovulation unprotected. My period is very regular and I'm supposed to start my period in 8 days. Should I be worried that I'm pregnant? I believe my ovulation was accurate. I had mild cramping and middle/lower back pain.
Answers

Wally's not a Wally.

50-50 If you had unprotected sex. If the only thing you have done is to eat an apple, there is no chance.

Beverly S

Good chance.

Anonymous

Up to 25% chance.

Mark IX

Either 100% or 0%.