Unusual Vaginal Bleeding. I was told everything is normal?

I know this is probably something that can't be answered without an exam, but I'm hoping to get some general information prior to. I'm a 32 year old female. I've never been pregnant and I am currently not on any kind of birth control. Within the past few months I have been experiencing some abnormalities with my menstrual cycle. A few months ago I skipped a period, so I went to my doctor. He determined that I was not pregnant and ran some bloodwork. Everything came back normal, so I was advised not to worry. Last month my period lasted almost two weeks (the average length of my period is usually around 5-7 days). Now I'm experiencing some very light bleeding off and on and it is too early to be expecting my period. I don't feel any pain, cramps, or discomfort during intercourse or urination...so far the only symptom seems to be the bleeding itself and perhaps a decrease in appetite (don't know if that is related or not.) Given these circumstances, I'm wondering what my potential issue is considering just a few months ago I was told everything is normal?