L.P.
We had thrush due to antibiotics during labor, too. I assume you're treating yourself, too? Because as I'm sure they've explained it can pass back and forth between you two indefinitely if you're not both being treated.
What we did was this:
I took:
garlic supp 3x per day
echinecea 3x per day
grapefruit seed extract 3x per day
probiotics 3x per day
cut out as many sugars, starches, and artificial sweeteners from my diet as possible
painted my nipples with gentian violet before bed for 3 days, took 3 days off and did it again
For baby:
I gave her oral probiotics 3x per day (powder form she could suck from my finger)
put her to the breast after treating it with gentian violet to coat her mouth each night
treated her diaper area with chlortrimazole, 1% hydrocortizone cream and desitin (in that order) after *every* diaper change. I also cleaned her bottom with TP or cotton balls instead of baby wipes since wipes have moisturizers that can encourage fungus.
I only had to do 2 3-day courses of GV to get rid of the obvious plaques, but I continued the rest of the regimine for 2 weeks after that and have kept us both on probiotics ever since. It's never returned.
If, however, you've tried all this I would suggest talking to the doctor about Dyflucan as suggested. Thrush is pesky and a real pain to deal with! Good luck!