Help again!!!! I need advice

Cassie • Momma of Two Graci 5-7-15 Graeson 9-7-16! Angel Momma of Two Nov 2015 and Twin B Jan 19 2016!
I was due for AF friday11 dpo took three hpt the past three days and they were all BFN. I had alittle bit of cramping starting on thursday it stopped and yesterday i had a pinching sensation on my left side that lasted for like 20 minutes and then alittle cramping followed it stopped then cramping again last night not for very long they they only ladt like an hour or so.  I also took another HPT last night but again BFN?? And now last night i had period like cramps but they we t away after like 2 hours and this moring i have dull cramping with no blood sooo idk whts going on Am i pregnant?? Idk what to do just wait??? Is it just AF finally coming??? Thought please