I can't remember what ABs I took. I'm 61 now! ABs can cause problems as they strip good bacteria as well as bad. Some are worse than others, but you can't always avoid ABs. Always take probiotics to support your gut. I didn't know this then.
One doctor insisted I had impetigo, despite the fact there was no crust, had been there for months and was still localised. I believe it's hormonal. I expect the only way to stop it is to stop is to stop HRT.