Abnormal Bleeding! Help!?

I'm in my 20's and have been having abnormal bleeding for the past year. It's like a period but it comes way more often. It started around the same time I dried up from nursing my baby. At one point, it was constant, then it would come 2 weeks apart. I've been to several gynecologists. I've had multiple tests done. All came back normal. No one knows exactly what's wrong, except that it's some sort of hormonal imbalance! Duh! Doctor suggested birth control to reset the hormones but I don't want to use that. One doctor thought I needed progesterone, another thought I needed estrogen. The pharmaceutical progesterone (progestin) was awful. I had a terrible reaction to it. I took the natural progesterone cream for a few weeks and my bleeding actually slowed down. The, after a week and four days, it has come back. Btw, I also have hot flashes, headaches, nausea, exhaustion,cramps, back pain, mood swings, etc. I just wondered if anyone had some advice. Where do I go from here? Do I try estrogen?