Confused

Angela
I normally have a pretty regular 25day cycle. This month it was 34 days. AF arrived this morning or so I thought. I woke up with bad cramps and some dark brownish red blood. I used a tampon but when I went to change it there was barely anything on it. Usually my periods are a medium flow. I feel like it's AF, other than the lack of bleeding the symptoms are the usual. I haven't had any typical pregnancy symptoms. Anybody else have anything like this happen?