idk what's going on with my body

I am officially late for my period ... which is understandable since I had a miscarriage last month and I expected to be late.

i DID spot a super tiny amount yesterday... but it was brown discharge looking stuff and only when i wiped....but that was only once that entire day.

I took a Walmart cheapie yesterday and it was negative, but I've been feeling pretty nauseous lately but I cant throw up.

I'm super confused.

is it possible i ovulated later than i thought (even tho i had extreme amounts of ewcm on one specific day)?... cause I dont feel good at all and tests are coming back negative.