UVB guttate and plaque

Hello I wonder if anyone can offer advice. I started a P flare last January after I had a steroid injection for my thumb arthritis. Started off with little patches but has really ramped up since September. My legs and arms are covered in plaques. I hired a Phillips TL01 2 wks ago but am actually deteriorating. I have not burned at all and I’m up to 1 min 10 seconds. I’m getting more spots appearing and the sequelae ends up with them turning into plaques. The plaques I have are not improving yet and I think getting bigger. I use minimal enstilar to target visible patches on my neck- I gave up with it elsewhere because it wasn’t getting rid of them and I worry about the steroid. I wonder can anyone tell me if they have experienced the same. and should I persevere? Worried I might be making matters worse. Thank you if anyone can help.