first off stop taking the ala immediately. secondly, do you have any mercury fillings? if so then i would say, yes, the ala most likely triggered mercury toxicity symptoms.
the basic concept behind the cutler protocol is to take small amounts of DMSA/DMPS and ALA on a regular consistent schedule. taking ala while you still have mercury in your mouth is a bad idea. taking it on a haphazard schedule is a bad idea. i would suggest you read through the basic program here.