I get very regular period. My period was October 21-28th and since then I have stopped for a few days and it comes back and will stop for a day but I've been bleeding like this for three weeks now... Uhhh I'm concerned.
I do have endometriosis but this has never happened to me before .

It could be a symptom of the Endometriosis. How much are you bleeding? Have you booked an appointment for your OB? Regardless, are there any other reasons that you could be bleeding? IE rough sex. Are you on any drugs, including birthcontrol? All important things when considering this.

As of today a lot. I currently just lost my health insurance so I can't make an appointment . I'm not on any drugs or medications I can't even have sex because of the pain it causes me. I've never bled like this for no reason. Some days it goes away but not for long but today is the worst it's been I'm not in any pain but it's just weird

Although it could be many things, I think doctors will look to the endometriosis first.
Lost your insurance - when? From an employer? Cobra is no longer offered? Have you looked into all that is new under the ACA?
Regardless, look for a walk-in clinic. Call around. Call hospitals around you; they are usually affiliated, so that you don't have horrific ER bills and sometimes not very good care either.