Missed period but not pregnant?

So I’m like 41 days past when I was supposed to get my period. I take progesterone bc and I have missed a few my last pack...I stupidly took one of them that I missed and the one I was supposed to take that day, together. So I haven’t had my period since December and took a pregnancy test and it was negative. I have no symptoms of being pregnant either. So could the double up of pill (which I realize now I shouldn’t have done) be what is messing with my cycle?? I need some answers. I also have a scheduled gyno appointment soon. I’m just worried something is wrong w me now.