I have problems sleeping at night ( maybe 3-4 hrs a night). I have high blood pressure and that doesn't help with sleep ,I know. I have these health problems and wonder what could go wrong if I take a Diphenhydramine HCI 25mg tablet? Could it relax my breathing to the extent of me not breathing? Sorry poorly worded but I hope you can give me some info? It's hard to see my doctor and she graduated with D's.? Well seems like it.. Thanks