Have you done a parasite cleanse? I man a proper one, with at least wormwood, black walnut green hull extract, and cloves? Imo it should be done for a month. Take just the recommended dosages though, don't overdo it.

Keep in mind the much of the mercury excreted is done so through the bile(especially with ALA), so if you are constipated while chelating, you might be reabsorbing plenty of the mercury. Eating plenty of soluble fiber while chelating will help reduce the recycling of bile and help get rid of mercury.

Tingling can be due to vitamin B12 or magnesium deficiency. Loading up on those may help. Some parasites cause vitamin B12 deficiency. taking plenty of vitamin A(20,000 units a day?)
will help fight parasites and prevent reinfection. Many here have had parasites.

eating plenty of hoshradish, mustard, and cayenne pepper will help get rid of parasites and candida. Yellow mustard also has turmeric added to it. You could add turmeric separately to your food.

One theory on sulphur is that it is essential to eat plenty of high sulphur foods for chelation to work well, otherwise the body will break down the chelators and use them as a sulphur source, and they won't be removing mercury.