Massive POTS Flare-Up: Need Tips and Advice

(Pots vent? Massive flare-up, don’t know why) My pots symptoms have gotten 1000x worse lately and I’m not sure why. I haven’t really changed anything, same level of activity and same supplements. It’s been hard for me to stand and usually I can push past the passing out feeling but now I have to sit down immediately. It’s making it hard to keep my space clean because it’s every time I stand and I haven’t taken a shower in a week because I’m too exhausted and worried I’ll pass out. Plus I’m always shaking and have constant heat flashes (but I live with a roommate that likes a warm apartment and doesn’t take my conditions seriously). My IBS is raging rn too. I could go on and on though it’s like every symptom I’ve ever had is turned up to 150% today. Idk if it’s the change of weather or what but this is one of the worst flare ups I’ve ever had. Anybody have tips on managing or willing to share things that have caused their own flare ups in the past?