Red wasp sting

Patient: I was stung on my big toe yesterday afternoon…my foot became swollen at the bottom and on top and very red…my foot was very tender to the touch…i’ve applied medicine, ice pack, elevated my foot and took benadryl…this morning it is still slightly swollen, red and still very tender to touch….i am very tired and have a headache, am i having an allergic reaction or is this normal…i’ve never been stung by a wasp before so this is freaking me out