Should i get paternity testing done if sex with a guy happened 2 months prior to the starting of my pregnancy countdown?

If you worry: If you are worried about who the father is then paternity testing is the only way to know for sure. I'm not sure when you started your "pregnancy countdown" or how you are determining when your pregnancy started ( dates?, ultrasound?)

Your call: I have no idea if you're asking for advice or need encouragement ? If you've had more than one partner in the time in question, and don't know who the father could be, you need the fsther' s DNA as well to do the test. I would limit the number of testers, it's not a cheap test !