Low blood pressure from b/p

21, dealt with bulimia for about 5 years on and off ( recovered now) and have fainted about once or twice a year during that time usually from hot weather and period pain. When I’ve been to hospital or been treated I’ve been told I have slightly low blood pressure but it’s not alarming and I’ve never felt negative effects from it in my daily life but in the past couple weeks I’ve been very nauseous, light headed, dizzy etc when I stand up and when I move around. I also cut myself accidentally while cooking and passed out from that, and I’ve never had a problem with the sight of blood or anything. At first I thought it was from being hungover a lot, I also have always struggled to drink enough water, but now I’m convinced it’s a long term side effect from my ed and want to act fast to damage control 🫣🫣🫣 any advice?