Pambyboo, much as I hate to say this, might it pay to stick with your rheumatologist? Because despite his sometimes dismissive manner and comments, at least he's taking you seriously, treating and monitoring you. Another way to view this: might a new doctor "undiagnose" you? Discontinue all meds? Send you packing?
Do you know WHY your rheumatologist wants to discontinue colchicine? Is it a med that shouldn't be taken long-term? Stopped if symptoms abate?
If it's of any comfort, I've had awful moments even with the two drs. who helped me the most. They said/did things that induced COLD FURY. I say "cold" because I weighed the probable fallout (if I left) vs. how much crap I can withstand (quite a bit, apparenty, from years in business world... And age. I'm certainly getting up there.
Like you suggest, I too suspect that your symptoms & labs are being viewed as borderline, not enough for a "for sure" diagnosis. (For example, ANA positive only occasionally, and only low-positive at that); one facial rash; etc. And I think Behcet's might be even harder to Dx than lupus.
Re: DVT's and miscarriages: have you been checked for APS (antiphospholipid syndrome)? There's a "stcky post" on APS at the top of the thread list.
I'm really sorry you're struggling with both symptoms and doctors. I hope others chip in soon, and that you're able to make a decision that YOU are comfortable with. Hang in there! Looking forward to updates, Vee