Yes she could be having an allergic reaction to the pork or the preservatives in the pork.
You can give her plain Benadryl if she is still showing symptoms. The minimal dose is 1mg per pound of dog so a 50 pound dog would get two 25mg tablets.
You can also expect diarrhea from this episode as all the fat in the bacon is apt to make her stomach upset.
If insects are active where you are this could also be a reaction to an insect sting or bite.
Hope this helps you!
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