Strange new symptom. Anyone else with this?

So to start off, i have a history of chest issues. Been to the ER with it, apparently everything is fine. During the last couple of weeks i occasionally get these weird feelings towards the outside of my upper chest. It's extremely localized cold water like feeling. Like there is a cold stream of water flowing over my muscle. Usually from bottom to top.

Some weird neurological thing? Maybe connected to Abx?

Anyone else with this?

I often had the sensation of cold water dripping on me, usually arms or legs. That went away shortly after I started abx.

Ive had the cold water sensation but only on calves, arms, & once on a spot on my back. That symtpom went away after treating. Im still on treatment tho.