So confused

Casey
Last month I started my first round of Clomid, I have been spotting since Monday, AF was supposed to start Thursday but still hasn't came. The spotting has been very light the past 2 days, it actually looks like it might be ending today. I have been monitoring my temperature all month and it has remained in the 98's since ovulation. I'm just so confused as to why AF hasn't come yet. I can't take my next round of Clomid till it does.