Tweak pleas

I have a difficult situation. I had surgery to fix why I was mc. I've been on estrace for healing but in 2 days I start taking provera to jump start my period. I just wanna be sure I'm not pregnant before taking it because it's not safe, and NO RUDE COMMENTS PLEASE, but my husband and I weren't exactly smart a few times. So I just wanna be sure. I know it looks negative to the naked eye, but I've always had very light positives in the past that could barely be seen without a tweak. Just be extra careful