I had unproctected sex 2 days before I had my obviolution, is there a low or high chance

Anytime without protection is a high chance of pregnancy...

If you have sex anytime, there is a chance, if you had sex during your ovulation period, there is a very high chance.

Chances are always high to get pregnant whenever you have sex. How do you know you are tracking ovulation accurately?

Sex during the few days before expected ovulation increases the chànce of pregnancy. Achieving pregnancy may still take many months, but it is the recommended time to have frequent sex when trying to become pregnant. If you are not close to ovulation, there is no chance of pregnancy.