Tonsillitis one day can be chicken pox the next?

Having fed Emily this evening, apart from her puffy collapsed eye, I also noticed some spots her forehead. I figured these must be dirty pore zit type things and proceeded to wash her (perceived) grubby face.

It wasn't until I went to change her nappy that I noticed similar spots "down below". Lifting her onesie, I was slightly horrified to see that her chest was covered in lovely spots.

This discovery has led me to one of two conclusions - she's either allergic to penicillin (I was asked by the pharmacist when I got Emily prescription from this morning's trip to the doctor), or she has chicken pox. The only real positive I'm seeing at the moment is I was right when I thought she didn't have tonsillitis.

I guess we'll tell what's really going on soon enough when her spots either turn cloudy or she goes into anaphelactic shock.