I'm 5 days late, just started getting pms(emotionally)is there a higher chance of being preg by pre cum, or have ovulated late?

No: pre-ejaculate can cause pregnancy but not at higher rate then ejaculate. Go ahead and take a pregnancy test now to know.

Pregnancy possible: Anytime you have unprotected sex, there is a chance of pregnancy. When you ovulate does not determine a higher or lower chance of pregnancy; what is important is WHEN sperm have a chance to interact with your released egg. "Precum" or secretions from the penis before ejaculation can contain sperm. A pregnancy test can help you determine if you are pregnant at this stage. Take care & good luck!