Hi Sarah,
Certainly didn't have too much good fortune with homeopathy here to help with tic reduction.

You mention anxiety, tantrums, tears and is difficult to get to sleep and that your son is 3.

Tantrums and tears sound pretty regular for a 3 year old, but it depends on the severity. It's hard to offer too many suggestions without knowing more, really.

Anxiety and sleep issues? Well obvious anxiety in a 3 year old must be a huge worry.

What exactly is your son's diagnosis and what type of tics did he have before you did the allergy treatments? He's been diagnosed with Tourette's Syndrome? Just curious.

My son's tics began very early as well. Around or before 2, but he has other conditions that complicated correct diagnoses early on.

Please post more and we'll see if we can offer more suggestions. It truly is difficult with little information.

Dr. Roger Freeman - Tourette Syndrome: Minimizing Confusion