Something weird has been happening to me.
It all started last year when around October, I began having these twisted and strange symptoms that would only come all at once.

I never ever had them before and I'm 22. I basically start feeling unsettled and to itch the skin off my legs for ages. I scratch and scratch only on my legs! My mouth gets dry, I start feeling nausea or a need to constantly use the toilet.
It helps when I sip water but my legs keep itching me so badly.

If I take an antihistamine I feel better and fall asleep. All of this would only happen at night.
These little attacks stopped around February 2020 and tonight I'm having one again.
Never had an allergy test and I am going through a lot of stress.

Can you give me some tips or tell me if these symptoms could be allergy symptoms?