I've had my period for 6 years, and it's been constant for 4 years. I normally bleed heavily for the first 3-4 days, and normally feel very bad right when I start (due to endometriosis), so I always know I started. Normally my cycle is 30-32 days. This month something different is happening. Around day 17 of my cycle I started noticing some blood in my discharge. I would only notice it when I would wipe after going to the bathroom, and it was on and off for about about 4 days. It stopped for 3 days, and started again. It did that for 3 more days. On day 27 of my cycle I started to bleed all day, and I thought this was probably my period, but I wasn't sure since it was so light. I've been bleeding all day for 12 days now. It's really light bleeding, and that is something that makes me unsure if this is really my period or not. I also wasn't sure because I've had no hurting at all. Normally a lot of pain, and I have some pain medication that I take to make things bearable. This time I haven't had to take anything at all, and the only pain I had was a little bit of cramping, but it only lasted 5 minutes. I had my last gyn appointment in April, and everything was fine then. I do not know what is going on with this though. I'm going on vacation in less than a week, and I would really like for this to be fixed before then. Not because it's painful, but because it makes me a little worried. I'm not on any medications, not on birth control, not sexually active, haven't changed eating or exercising habits, and basically nothing in my life has changed. I do not know how long I should allow myself to bleed before I do something. I thought today I would stop because I wasn't bleeding last night when I went to bed, and wasn't bleeding when I woke up, but it started about an hour after I woke up and has been going all day. Is this period maybe longer because it's been so light? What could cause this?