I have been constantly bleeing for about 3 or 4 weeks now. The degree of bleeding seems to vary each day from either heavy or light, sometimes red, sometimes brownish in colour. I am wondering what may cause this as I am sure I cannot or have not been pregnant. I usually use Depo Provera injection for birth control, and also wonder if smoking crystal meth a lot could have anything to do with causing a hormonal problem.
If anyone can help I would appreciate it.
Cheers.

Meth causes, among other ill effects, all sorts of vascular problems.
Stroke is common, and you won't know right away if you have smoked a lethal dose.
There are other possibilities such as fibroids and hyperthyroid, but I'd bet that any doctor would first attribute this to meth.
Hopefully you are willing to check in to rehab, where they will take care of this.