Pregnant..? Advices needed from baby mommies

Alicia
I had sex with my SO back in February 28th which was the first day of my fertility (according to GLOW) and I have a strict schedule of a 23 day cycle. The latest I've had my period was 3 days late.
However, this month my 'period' came  10 days late (I was supposed to have my period around the 9th but I bled a bit on the 18th) and only lasted 2 days. It was slightly heavy only for a day and disappeared. 
3 days after I woke up to a horrible cramp in the middle of the night and started crying which freaked the hell out of my SO. (A heat pad did the trick) 
After that I was fine until this passing Sunday when I wiped a slight pink yolky discharge (nothing came after that) 
And now I've been having dull cramps on the right side that's irritating everytime I move too fast or turn a certain way. 
I asked people around me that had a baby but all they said was 'congrats' which was no help at all.
I scheduled an appointment with planned parenthood today, but I would like the GLOW community's input.
Thank you for taking the time for reading this! I've been really stressed about it the past 2 weeks.