Period Going on Day 9

So, when I was on vacation, I thought my period was coming because I had some light bleeding/spotting for about five days. We got back from vacation on Sunday, and I appear to be having a full blown cycle all over again. I'm not on birth control, my husband and I use the "old fashioned," unreliable method (lol), and I had a cycle last month. However, I experienced some light bleeding after sex and after last months cycle as well. Has anyone else experienced this?