Period

I didn't get my period for 2 months, I was spotting for almost 2 weeks on September around the 11 and October comes and I got my period on the 11  but today is my 7th day with my period and seems not to get light. I never get sore breasts while on my period till now,  I have been taking prenatals can that be causing my period to last long? Or should I wait till next month to see how my period is so I can see a doctor?