Please help... I got my period the 29th it was normal lasting five days my cycle is always 30 days I had unprotected sex before my cycle and on the day it was over and the day after that 2 days later we had unprotected sex and I went to wipe and saw a pink discharge I brushed it off we had sex today and I seen a yellow thick discharge with no odor could I be pregnant

Any time you have sex, especially unprotected sex, pregnancy is possible. So yes, you could be pregnant.

The yellow discharge is a concern. Yellow is not a normal color for vaginal discharge. But, the discharge would have nothing to do with pregnancy.

Wait until your next period. If you miss it wait a week or two, then take a pregnancy test using first morning urine. If it's negative then wait until your next period is due, and test again if you miss it, or see a doctor for a more accurate blood test.

As for the discharge, I would see a doctor about that.