Oh hon, no one really gets a reflux baby unless she's had one herself. Welcome to the club!
Ok, the first thing I noticed is her A time is REALLY long for a baby so young. Most 5 month olds are only awake for 2-2.5hrs maximum but it seems like she's awake for at least 3 hrs each A time. That is the first thing I would suggest you change. Pull her right back to 2hrs for a few days and see if that helps. 30 min naps are typically a strong indicator of an over-tired baby. She should also still have three naps during the day. Most babies don't make the 3-2 transition until at least 6 months.
Regarding her meds, are you sure they're the right dose? My guy threw up and though he continued to throw up, the raniditine eased his pain. Maybe the meds need to be upped due to a weight gain? Check with your doctor.
Is her mattress on an incline? We used our two copies of Harry Potter and the Half-Blood Prince because they were the thickest we could find. Is she lying on her left side? I made a towel roll and placed it under the sheet to ensure my little guy was secure and my midwives and doctor both recommended the position.
The rule of thumb for reflux babies is; you do whatever you have to, to get those babies some sleep. You may have to wear her for her naps, or walk her in her stroller. Whatever. Until the pain is under control, no one can expect her to be happy and peaceful.
I'm sorry your family is being so unsupportive, they clearly don't understand the whole situation. That must be incredibly hard on you.