I there I'm 11 weeks post op and getting hundreds of spots on my arms tummy and face is anyone else had this problem?

I personally have had no spots or heard of any. Any chance that you're allergic to dairy or whey? I assume that you're consuming protein drinks? Maybe try soy protein. Is there a chance that you've been or are on antibiotics? I'm suggesting you ask your primary care physician. Good luck!

Could it be an allergy?

I think it sounds like an allergy, too. Have you added something new to your diet? Are you taking antibiotics? Fleas, bedbugs, chiggers? chickenpox?