Help with thrush??

I think my 5 week old has it. He's got a few spots on the inside of his cheeks & a little but on his tongue..

I just noticed today that he's been fussy while breastfeeding..

My question is, can I just see my OB for him & I? Like can she prescribe something for both of us if she thinks he does have it? I ask because I have my 6 week appt tomorrow & don't want to schedule both him & I appts if I don't have to..

Also, is there anything I can do for him? I feel so bad. He's so sad!