Struggling with Multiple Diagnoses and No Answers

I have been suffering from symptoms of POTS, all over joint pain, loss of mobility in my leg (I use a cane now, I can’t move my left leg without excruciating pain), hypermobility joint issues, scoliosis & sciatic nerve pain. I also have PTSD & digestive issues, and am allergic to almost anything you can think of. I have several skin allergies and issues, very low blood pressure that only gets better by consuming too much salt that my body can’t handle (which isn’t helping my problem), and altogether I feel at my wits end. Is there a more all-together diagnosis for these issues? I know I’ve been suspecting fibromyalgia for a while now and my partner thinks I may have ehlers danos syndrome, and my doctor thinks I could have Mast Cell Activation Syndrome. I feel like I’m getting diagnosed with so many new horrible things so fast, including the fact I now have to get an ultrasound on my left thigh to figure out what this giant soft lump in my leg is, since they’ve ruled out lipedema, lipoma, and cancer for it so far. If there’s anyone who has heard of these disorder’s symptoms together or heard something similar to my story before, did they ever find out what was really wrong with you, or did they keep just piling on more diagnoses and throwing treatments at you that you couldn’t afford that didn’t really work? Any kind of feedback is respected and appreciated, even if you don’t have any answers or advice for me. Thank you for reading. 💖