I think I may have an allergic reaction to something I ate today (I think raspberries because I haven't had them for ages, though I never noticed anything weird happening after eating them before). I have a few patches on my face that look slightly swollen (like after a mosquito bite) and are really itchy. Same with my neck and neckline... Is it likely to be some sort of an allergic reaction? Any over the counter stuff I can use to calm this down? Help!