I am 44 yrs old. Never had any health or psychological problems - aside from mild cold 4 or 6 times when i was much younger. My mother and grandmother had issues with nervousness, rather on the high side, but not really serious anxiety.

What is happening to me during last 2 months is truly scary for me....... sudden, increasing smooth muscle contractions, twitching, squeezing of vessels in legs, arms, chest, neck. When this happens, i have panic attack.

**So far, this nasty thing only happens inside my home**, when its poorly ventilated due to too big cold outside. NEVER it was getting worse when I am outside  breathing fresh air. I even did experiment - slept on the balcony in warm clothing and.... these symptoms went away almost instantly ! But, when I came back to the room after just 3 hrs of excellent sleep - twitches immediately came back! How can it be anxiety?

My heart tests are OK - D-Dimer, EKG, X-Ray. Blood tests: sodium potassium, creatinine, magnesium, red blood cells. 

In addition to these horrible twitches (which happen randomly in time, but only when I'm inside my home) i also got acid reflux, never had it before. Can both conditions be connected?

Can anxiety get suddenly much worse due to just air quality? Like oxygen level (it can go down with heating), humidity or maybe too little negative ions? Please share your thoughts, what could it be.

I will visit psychiatrist to check if i truly have psychological or neurological issues, but i suspect even if i have them, they are not that strong to trigger such symptoms.

Any input based on your experiences or knowledge greatly appreciated.Thank you.