wicked thrush... tongue,throat hurt ideas?

I see my pulmonary dr. today, I am guessing it is oral candidiasis, thrush, I have no real white spots, tongue is red with bright red streaks, it bleeds when i brush it (one time daily) my teeth twice a day, and my gingiva and my throat hurt and it really hurts to swallow. Along with it I have been on a wide spectrum antibiotic because i have a deep cough with a variety of phlegm colors. (pretty huh) I am diabetic med controlled, SLE and in a flare, RA, GERD, IBS, Depression and anxiety and Gulf war illness stuff. I do take MTX, Orencia and i am on an antibiotic, so with all of that i led myself to the thrush answer... here is my question

What doctor do i go see? Rhuemy, family, pulmonary, GI, DDS,

this is quite painful and i get it often but now my tongue bleeds too. so with the constant xerostomia (dry mouth) i am getting frustrated.

Thanks ...

i had an appt already today with my lung dr. he was really great, he thinks about the whole organism (which would be me) just not in parts or pieces. he agreed with the rhuematologist a maintenance dose of prendisone for now good idea, just by looking at me starting at 10mg for 5 days then 5 mgs then i have an appt with him and infusion 3 days prior to that and he wrote me a script for rotuxin i think that is what it is called. he also said to rinse with warm salt h20 it will help with the dry mouth and because i am on an antibiotic that can disrupt my GI problems to go to a health food store and get some baccilus of some sort. (i wrote it down) thanks so much for your reply, i am so tired and sleepy too. need to eat something and rest. I love it when i go to an appt and feel like i got something accomplished. Erika my 19 yr old had an mri of her shoulder ..she was a swimmer all through HS and has had pain esp in her right shoulder she has done alot of physical therapy but it stills bothers her and wakes her at night. So we decided it would be good to get a baseline at least. I am hopeful that it is something minor, or that has a simple fix.