New Allergies.?

Hello everyone! I have a totally random question but I’m hoping it’s a good thing! So my fiancé and I are trying to convince and I’ve been experiencing some maybe pregnancy symptoms!? Haven’t taken a test yet, but will be Sunday! 🥰 We’re hoping for the best! This will be our first little one and I’ve been praying it worked! But I had something weird happen last night.. I got a scratch on my arm and covered it with a band-aid and left it overnight. I went to go take it off the next morning and it was itchy and swollen and tore some of my skin off.. I’ve never been allergic to adhesives or anything of the sorts before, so could this be a sign of some sort..? Have any of you became allergic to things you weren’t allergic to before while pregnant..? Thank you ladies and wish us luck that this is it! 💕😍