Symptoms after short period???😩😩

My period lasted 3 days when they normally last 5-6 days. The 2nd day of period was pretty heavy. However I did notice that all my cramping went away on the first day. Today cd 5 and in having pretty noticeable lower back pain on my left side. I did bd yesterday and today not sure if that had anything to do with it or not.  Yesterday cd4 I had twinges in my ovaries on the right side as if I was ovulating. Has this happen to any one experiencing symptoms after having their period? Maybe I'm thinking to much into it.