It could be a tooth thing. There’s little tubes in the enamel of your teeth and if you eat a lot of acidic things the minerals that sit in those tubes can get pulled out. (Ditto if you do tooth whitening procedures). If this happens, the affected tooth can become really sensitive to sweets or sugary foods. You can potentially reduce or get rid of the sensitivity by using a remineralizing toothpaste or gel (sensodyne is probably the best known brand but there are others).

If it persists, it’d be a good idea to get a dentist to look and make sure you don’t have anything more serious going on.