HELP me I'm freaking out a little

So, I've finished my first round of letrozole, I should of started my period on the 17th of this month..... I decided to take one last Thursday (bc the apps told me to) it was negative. My dr office told me to take one of day 35, Saturday, if I haven't started and to call them either way with results. They would then start me on provera and then round two of letrozole. This was my first time ovulating while TTC within he last year 17 months!  I have a bachelorette party I'm throwing for my sisters tonight and wanted to take a test to make sure whether or not I could drink. I know I'm definitely not seeing things. But my fear is could this be wrong?!!!! I'm about to go buy more tests. And take another one in a bit. But I wanted opinions of strangers who don't know me. I don't want to tell our friends and family before my hubby.