I was stung by a wasp and when I was younger I was told by a doctor that I am allergic to them. My finger is swollen, extremely sore, and kind of purple; my hand was cramping, but has ceased. I was told to take Benadryl when I am stung. However, I have now had to begin taking Zyrtec in the mornings for other allergies. Is it alright if I take the Benadryl when I have taken Zyrtec this morning?