STD still possible with no white blood cells found on pap smear?

Long story short, my husband was unfaithful in February (last time they were together). He started having burning when peeing, discharge, and soreness around the opening on Sunday. I went in to get checked for STDs today even though I am not having symptoms. They did a urine test as well as a pap smear and l exam. The doctor said nothing looked abnormal and under the microscope there was nothing abnormal except some yeast. No white blood cells, no discharge, etc. What is the likelihood that I have an STD such as Chlamydia, etc? I know you guys aren't doctors but I won't have the results back until Friday and I'm losing my mind over this. Help, please!