It's probably just a corpus cyst. Basically it hasn't gone after you didn't ttc and it normally produces the progesterone that brings on your period. Apparently it's the main reason we can be a week late but not pg. It's totally nothing to be worried about.
I know when I ovulated so it is late. Iv had a corpus cyst before and have had none of the symptoms of that. Just going to wait a few more days and then test again. Iv been extremely regular up until this cycle.
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