Extremely Painful Yeast Infection

I went to the dentist and had an infected tooth so they prescribed me 500mg of Penicillin 3 times a day. Everytime I get prescribed antibiotics it gives me a yeast infection (but not how bad it is now) and i told the dentist that and they told me if i get a yeast infection to just but monistat from a drug store. So I got the yeast infection of course and used the monistat and it worked a little bit but then when i was done it got worse. It hurts so bad what do i do? My doctors office is closed until Monday and urgent care is closed for the night but I’m in so much pain. It’s super dry down there, it really burns, itches so bad, and it’s cracked like crazy. I don’t have anymore money to buy anymore medications for it.😭😭😭What do i do?🥺🥺🥺🥺🥺