Long Cycles

I hate to be this girl because I feel like I'm aware of my body all the time but recently my periods last two weeks. The first week is brown blood, like the beginning of a normal cycle and then the second week is a regular flow. I have the usual stress and I haven't been on top of my BC but that's normal for me too (shame on me, I know). I'm at a loss. I don't have insurance and won't until Fall semester so I can't just walk into a OB. Any ideas or similarities would help. Thank you.