Allergic reaction to Benadryl??

Hayley • 🐝🙏🏼😇✝💕📖
I have been taking Benadryl at night to help me sleep. The past couple weeks I have had a rash on my arm and now another weird spot appears two days ago on my neck. Has anyone ever had an allergic reaction to Benadryl?? I just can't think of what else it could be.