Implantation spotting then period few days later?

Ok so im on Clomid, have been for a few months, usual story each month is i do Clomid, ovulate, period starts etc. I have never randomly spotted or anything like that. This month using OPK's, and checking CM I ovulated around Day 13, then on Day 20 (Xmas Day) I wipe a small amount of pink, i assume its an early period, later that days its brown CM, the following day its a very small amount of brown CM then nothing....very strange. Today is Day 24 and tonight im spotting pink so assume this is going to be my period. I had such high hopes that this would be our month after a long time ttc but it seemed to good to be true, which it appears it is. Has anyone else had any thing like this?? I know its normal for some people but this has never happened before, I wonder if it did implant but hasnt held so to speak?