Advice please

It's day 29 of my cycle, and I always start day 27 according to 6 months of charting.(this date has always been the same) I am so nervous as I have had cramps galore---still am and lots of I know TMI flatulance--and I'm never gassy.

Two days ago, I put on a pad because my period was due, and had a spot of blood... nothing since. I am worried as I am extremely high risk.

Is it possible I am pregnant?? Should I wait?? Anyone ever experienced this? My first pregnancy I had an odd twinge in my belly--like butterflies and I just knew something was odd. I haven't had that.

Thank you for reading, and would love advice.