Day 4 of light brown spotting ?!?!

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I hate this waiting game!! My cycles have been on average 25-26 days since getting off BC in December last year, mostly 25 days. I’m on cd 27, 12dpo and on day 4 of light brown spotting. Only see it when I wipe. I have sharp pains on the sides of my lower pelvic area but mostly on the right. Very little cramping and really sore bbs. Negative pregnancy test yesterday. Anyone else feeling the same?! I just wish AF would show already instead of driving me crazy 😩