Yes, sensory overload. IKEA still gets me. Regarding skills to manage this, figure out your triggers and know your limits. I can't go to concerts - too much audiovisual stimulation and I walk like a drunk (disequilibrium), can't talk fluently for days and my vision goes blurry. The following help me:

Lighting - sunglasses can work wonders - experiment with lense color/darkness
Sound - sound cancelling earbuds are great
Movement -- well, I still hold onto the arm of whomever I'm with for balance
Cognitive - The amount of choices in stores, deciding which product is better over another, etc. can be exhausting as well - I've learned to know my limits to avoid side effects.

Find what works for you. At the beginning of my recovery my neurologist gave me "melt down pills" because going to a restaurant caused emotional lability (uncontrollable emotional reaction out of proportion to the situation - ie embarrassing moments) before I figured out my limits.

Also know this can hit you when you're under stress in the future - I forgot and was surprised when it hit again in IKEA.