Am I pregnant?

I'm 4 days late for my period and I haven't done a test yet.  I don't seem to have any of the usual early pregnancy signs (no spotting, no sore boobs etc) but I have been experiencing on and off cramping for the past 5 days. I also experienced a yeast infection for the first time in my life a few days after I had sex during my fertile window. Do you think I could be pregnant?