Taking the test

So, I have tendinitis in both of my hands. My doctor wants to put me on a med that is like super high dose of ibuprofen. I mentioned to him that we are trying to get pregnant, and he said I couldn't take it if I was pregnant. So I was going to take a pregnancy test to make sure before I started taking this medication. My question is, if I was just ovulating will it even show that I'm pregnant, if pregnant? I'm not suppose to have my period for another 12 or 13 days.