I'm out ?

So af was due on the 18th and last night I was spotting pink only wen I wiped sorry tmi, and thought it was implantation bleeding as that has never happened before but now the full af is here and I cud just cry ! Totally had all the symptoms but obviously my mind was just playing tricks on me. Also this is tmi but this time my af cramps seam to go from my uterus and right down into my vagina! It's very uncomfortable! Has anyone else experienced this ?