My husband and I are TTC, no luck yet. The week of ovulation were intimate several times. Now just a few days past ovulation I've been extremely tired the last two days, cramping a little today (it didn't feel like my normal menstrual cramping), backache, loss of appetite, and spotting. The spotting and fatigue concern me most. It's a light pink color and only appears when I wipe. I don't want to get myself too worked up about anything until my next expected AF but I'm curious what you all think.  Could this be implantation spotting?