Need to taper off of Alcohol, but I took a Benadryl this morning. Still safe to taper?

Basically the title. I’ve been tapering off alcohol for the past few days. I was planning to go down to 10 drinks tonight, but I took a 25mg Benadryl at around 11:30am (to help with some hangover nausea). Should it still be safe to continue consuming alcohol tonight? I started at around 10pm tonight and I’m around 3 drinks in. I do feel a bit more tired than usual right now. Feel a little bit stuck and not sure what to do right now, because I kind of do need to keep drinking to taper down at some point tonight…