As I, too, have had fluctuating oxygen levels. So, I've been doing research and it seems to correlate with COVID that I had in a bad way a year ago. I've been monitoring my stats for several months. What I've found to make sense for me is that it has to do with (injured) mitochondria in cells that are responsible for energy, particularly in muscle cells, and the heart is a muscle. I think that my heart has been struggling periodically due to this, causing my O2 to go down to 92%. I learned about activity induced exertion and that if you have it, it needs to be healed before aerobic exercise is advisable. So, I've tried to do weight-based exercise when I can, while minimizing the urge to push myself (in general), which has caused me to hit brick walls of fatigue, or to have heart palpitations or high heart rate (I was always low before, even too low). For my heart, I have been taking a small dose (~1/4t - 1/8t) of Japanese Knotweed powder in the morning (IMO a better form of resveratrol) and resisting the urge to overdo it. I've been avoiding aerobic activity, since I learned about activity induced fatigue related to COVID.

I have had general anxiety, but it turned into an actual symptom from when I had a bad bout a year ago. I did some more reading and it seems that part can be from brain inflammation. They also spoke about clots, and I happened to have a clot in my intestines last year. I know there's a gut/brain link.

What I'm doing to improve inflammation, overall, and to recover from spike is to consume products with shikemic acid, high a.m. doses of Vitamin D3 (up to 10k UI/day, though I've heard that more can be taken short term when needed). Of course, ~20min of sun/day w/o sunscreen is supposed to be best, if can). I pair it in the p.. with dose of K2 (to make sure calcium is ushered into my bones where it belongs). I take Omegas (3 & 9), and Spermidine, which seems to have helped my energy level. Since C can block calcium, I take a plant-based version of Vitamin C for anti-oxidants ( well after my vitamins that contain calcium) (ex: camu camu) several times/day (I avoid ascorbic acid, which is made from black mold grown on GMO corn).

I also take supplements that escort debris/parasites out of the body. I think this part is very important. (Neem, activated charcoal, pine tea, anise tea...). Slow-release melatonin is supposed to be very effective, but some people get nightmares (I did). We used 10mg or less (can cut it). I believe that they help with autophagy.

Some treatments I want to try are HBOT (hyperbaric oxygen), possibly get my blood cleaned (EBOO)... I'm still looking into those.

What I do find particularly important is keeping myself grounded and emotionally regulated. I have to be good with saying no and with not being a people pleaser since I need to prioritize my own self-care. I have to be my own advocate with gentle conviction. That hasn't been easy, but I'm empowering myself in the kindest way I can.

I hope that my share helps people.