OK, lets look at facts:
Ovulation occurs 14 days PRIOR to the start of your next period. If you have a 28 day cycle, this would be the midpoint between your periods. However, it can be /- a day or two and not all women fall under this 'perfect' cycle.
Which would mean you would not have been near to ovulation the first time you had unprotected sex.
The second time you had unprotected sex was 5 days ago. It takes up to 6 days for a zygote to implant on your uterus. It takes 10-14 days for a pregnancy test to be positive. The SAME hormones that make the pregnancy test positive are the SAME hormones that cause pregnancy symptoms.
So, no, you are NOT have symptoms of pregnancy. You might be having symptoms of a urinary tract infection, the flu, being overly tires and or stressed out. But this is NOT pregnancy symptoms.