Late AF and Brown Spotting

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My AF was due 2 days ago. I had some brown spotting yesterday and the day before and now nothing. If i cervix check I see some brown on my finger but nothing when I wipe. I’m also having period like cramps and headache. I’m trying to hold off on testing. I am now at cd 28. My cycles are usually only 25 days. With my last 2 children I felt like my period would start any minute. With my 3 yo, I had a tiny bit of implantation spotting and then some random red bleeding at 6 and 8 weeks. After having him I had some fibroids removed so I have no clue what a pregnancy would be like now...I don’t know. Any similar experiences that ended with a bfp?