No real period after clomid?

Alex • ✨ Due March 2021 after 4 IVFs, 2 transfers, and 1 anembryonic pregnancy ✨

I am super late for my period after confirmed ovulation with clomid. I bled for three hours only on Sunday and have had very light spotting the few days before and after. Several bfn. My temps have returned to pre o levels, which makes me wonder if that was my period? I know clomid has a potential side effect for thinning linings, but could it thin it that much? Waiting for the doc to call me back but hoping someone’s been in a similar situation.