anemia + low pulse ox + trouble breathing/passing out, should I be concerned?

AFAB, 30, 5’2, 105 pounds or so. I take iron supplements, Lyrica, Trintellix, Lubiprostone, Qulipta, CBD, and multiple antihistamines. History of tethered spinal cord, dysautonomia secondary to tethered spinal cord, asthma, anemia, migraines, and something called MCAS. Phobia of doctors/hospitals.

Symptoms: tingling/numbness in hands and feet, chest pain, chest feels heavy, head pressure, weirdly low numbers on pulse ox, trouble staying conscious while completing tasks

I’m supposed to be getting iron infusions for the anemia (my ferritin was 9 despite months of high-quality supplementation) but it’s taking a while to get all the prescriptions and the insurance company stuff and the preauthorization settled.

The thing is, I’m really out of breath. Every time I try to do household chores or even sit up for too long, I get dizzy and have to gasp for air. Then I start making dumb typos and it’s hard to think and my head feels like it’s going to explode, then I get double vision, and then I start yawning until I can’t keep my eyes open any longer. I have an oxygen concentrator (because the asthma used to be really bad when I lived in an environment with lots of secondhand smoke, I’m OK now though) and I’m fine and normal as long as I use it. But if I take a break from the oxygen concentrator, even to use the toilet, I start to feel really sick again, like my body is telling me that I’m going to die. Also, if I try to have sex or do active household chores, shit goes all fuzzy and I instantly fall asleep.

I have a pulse ox. I decided to see what number it shows. When I’m not using the oxygen, it reads low numbers, between 90 and 95. When I’m using the oxygen, it’s normal, like 98 or so. My friends are like “should you maybe go to the ER? You look like shit,” but I’m not sure what the ER would do for me except give me fluids and send me home, since I don’t have the prescription for the specific type of iron I’d need (because of the mast cell stuff the doctor said it’s only safe for me to get a specific type of iron) My heart rate is between about 110 and 120 or so, which doesn’t feel that bad (I’ve had it go up to 180 or so so anything under that feels like no reason to worry)

Is there anything I can do to manage my symptoms at home besides using the oxygen tank? I’ve been trying to stay calm and drink broth, but I can’t sit here on the floor with this dumb tube in my nose forever. My pets need me to get up and take care of them, and I haven’t showered in an embarrassing number of days because I get too out of breath just washing my face. Also, is there any point at which I should maybe consider going to the ER?

(I know I have a history of waiting to go to the ER until all the doctors are like “you didn’t shit for two weeks post-surgery? Why didn’t you come in earlier?” or “wdym you decided to just raw dog having kidney stones?” but I feel like I don’t have proof that my weird new symptoms aren’t just dysautonomia, which I know ER doctors hate seeing.)

(Also, how do I rule out panic attacks? I don’t think I have anxiety because I don’t feel anxious- if anything, I just feel sleepy and apathetic- but I know that’s the first thing doctors want to rule out in cases like these. I really hope this is psychogenic because hospitals scare me.)