Trying to conceive

So me and my bf have been trying to have a baby this month and we had sex every other day during my fertile window and my ovulation day I predict it to be on 3/15/18 and we had sex every other day before and after and this is our first time trying to have a baby.. what are our chances and when should I take a pregnancy test? Took one 2 dats ago from the dollar store and it was negative but maybe I took it so soon and I’m just excited. Please help!