Can the any of these medications be causing high blood pressure? benadryl? phenagran? and or reglan (metoclopramide)?

All could be: If you look at the possible side effect profile for each of the drugs you mentioned, high blood pressure is listed as a possible side effect for each one. Side effect profiles for drugs are very patient dependent and very hard to predict. Sometimes starting and stopping medications in an orderly fashion can determine if one is causing the undesired side effect. Talk with your doc.