Monistat allergic reaction??

Okay so I think I have a yeast infection. I have the symptoms of itchiness, scaly rash, clumpy discharge. I bought Monistat 3. I used the first one and it feels like the itchiness increased but thats listed as a side effect so I was like okay this is normal it’ll just get better. But then I started feeling like an aching pain inside my vagina. Felt like cervix pressure almost. I’m not sure what to do. Is this normal??

Edit: also I’m noticing that my labia minora is looking swollen?