I'M KIND OF SCARED! Please help !!

Paige • Trying to conceive #1 since July 2014
I had EWCM on the 14th of this month so I figured i ovulated around then. It is now the 27th. I had a light (gush) sorry, of pink blood this morning so I put a tampon in thinking she was here. I Took it the tampon out around 2 pm and there was nothing on the tampon and no blood since. Could this be implantion bleeding? I know it's late for that but my only other option is possibly a cyst. That's the scary part. I'm gonna make an appointment with my gyno on Monday but my mind is going crazy now:(  I have had allot of cramping, bloating and sore boobs for a week and half now. Any advice or insight would be so so appreciated. 
Thanks guys!