hello and welcome to hcm,
there are several treatment regimen for thrush
as you are already using it
once a day for 1-2 weeks is the last resort in medication environment
Apart from this some self measure are very helpful
1. maintain properoral hygiene
2. stop mouthwashes as they destroy microbial balance
3. quit smoking
if you do.
visit the dental surgeon(oral medicine specialty) asap.