Allergy after dermatology treatment

This is probably unavoidable, right..? First, I went in because the photos 1, 2, and 3 (the two side-waist areas and the groin) made them suspect ringworm, but I was prescribed allergy medicine. They also told me to get treatment, so I asked if it would hurt and said my skin is sensitive, but they said it was just light exposure, so I went ahead. Right after receiving it, it was fine though? But then it got itchy and burned a bit, so when I checked, it had become like photos 3 and 4.. (+the ointment I was prescribed had no effect even when I applied it, so I put on the antifungal I had been prescribed before, and that helped a little..) I’m going crazy It’s much bigger than I expected, so I can’t even wear crop tops.. I can’t wear shorts either.. It looks so ugly. So that night I contacted the hospital, and they said it looked like contact allergy and told me to apply the ointment properly, and that was it. But when I said it was itchy, there was a burning sensation, and it was getting worse, they told me to come in to the hospital. I went in, but they only examined me for about 2 minutes, gave me an injection, and told me to receive regenerative light therapy and go home, so I was like, will it be okay this time..? They said even newborns receive it. And the injection seemed like a steroid, and since I take a lot of medication and my health isn’t that great, I didn’t get the injection. But when I was paying, they said they’d give the regenerative light as a service, so just pay for the consultation fee and go. The word "service" really upset me.. Maybe it was unavoidable because of my skin constitution, but the more I think about it, the angrier I get I’m so upset. Looking at my own body is hard enough already because of the dermatitis I had before, and it feels like I’ve gotten one more kind of illness on top of that.. I’m having a hard time.. It won’t leave a scar, right?