Quick question...

I have had completely normal cycles and periods since getting off birth control last February. Typically 26-28 day cycles, period for 3 days. Last month, I started on the 11th and bled for 5 days. Which was odd but i didnt think anything of it. Well i started again on the 31st, really really short cycle and i am now on day 7 of bleeding and it isnt like my normal period, its just light pink and it isn't heavy, I'm maybe going through two panty liners a day. Any thoughts?