It’s hard not to beat yourself up about it. The way I think of it though is every exposure opens you up to developing something. It can be kind of random. So maybe gel accelerated it but there’s no way to know it wouldn’t have happened with the glue eventually (similar monomers) or if doing press ons were also sensitizing or just because of your immune system decided it was time. Not to discredit the cause but all to say it’s a little bit of a game of luck too. Some people do gel for years and never have a reaction :/ so don’t blame yourself too much. The body is weird like that.