Right now I am taking:
Coenzyme Q10 (Ubiquinol) 2x100mg
Omega 3 2x1g
D-ribose 3x2 1200mg pills
Acerola 3x500mg capsule
Panthotenic acid 2x500mg
Magnesium chelate 2xtbl (not sure about the dose)
Chlorella 3x5 250mg pills
Hawthorne 1x500mg pill
L-carnitine 2x250mg
Fish oil with A and D vitamins
Herbs for sleep
Nothing seems to help (I am taking them for 1 month only)
It sounds like you started all of them at the same time. This isn't the best idea because you won't know which one is working and which one may be causing problems.
In general, you should start one supplement at a time, and even start with a fraction of a supplement if necessary and work up from there to a normal dose if you're able. This called "start low and go slow". It helps prevent adverse reactions.
I agree with starting with the gut to make sure you can absorb the nutrients from food and supplements. A general gut program is a gluten free/dairy free diet, probiotics, digestive enzymes and then betaine hydrochloride if you have low stomach acid. Perversely, acid reflux can be caused by either low stomach acid or high stomach acid. You can try the "baking soda burp test" (google it) to see which one you might be. Eat whole foods, nothing processed - organic or grassfed if you can, but I wouldn't obsess over it if you can't afford it. A lot of ME/CFS patients do well with a paleo type diet, so you're in good company there.
I just heard about bone broths helping leaky gut, so I'm interested in starting that myself. It also helps with bone health, so it's a good all around nutrition.
If you're having constipation, increase the magnesium. Increase gradually until you get very loose bowels, then back off a bit and that will be "your" dose. Make sure you're not taking magnesium oxide, which doesn't absorb well. So anything like magnesium glycinate, mag citrate, mag taurate, etc. is ok. The magnesium may also help with sleep and heart palps, twitchy muscles, etc. so it's a good all around one.
Like somebody else mentioned, it's better to divide up doses and take supps throughout the day. This is so they absorb better. I take mine 3-4 times a day (with meals so it's easy to remember).
Then, just to get you feeling better and at some kind of baseline, I would suggest going after your most bothersome problems. So if sleep is a big issue, address that next. I've had better luck with magnesium, melatonin, theanine or GABA, kavinace, etc. than with herbs. However, there is one herb I like called Seditol.
CoQ10 works really well for me for brain fog, but if it hasn't helped you already, it's probably not going to be helpful. Same with ribose, l-carnitine and herbs for sleep. In my experience, they work quickly or not at all.
I also agree that the Thorne Labs multi + sublingual methylcobalamin is a good suggestion for broad spectrum nutrition "insurance". This combo will contain some of the same supps as a methylation protocol. I get good relief from MCS just from the methylfolate in the Thorne, which means it's helping raise glutathione (one of the goals of methylation).
After you've gone after the "low hanging fruit", then you can try a methylation protocol in earnest. The reason I'm saying this is because it may be months before you see improvement in various areas depending on how fast or slow you can implement it.