Suggest Treatment For Tightness In Chest

Hi, for about 4 days to a week I have had a tight chest and a cold feeling in the back of my throat. The chest tightness moves around or even goes away sometimes but for the most part it in the base of my lungs or sometimes a bit lower than my rib cage. Right now it's directly in the centre of my chest, It also feels like something needs to be cleared from deep in the back of my throat every so often when I breathe in. I do or did smoke. I've made a conscious effort to stop but it's only been a couple of days.



I'm worried it's something very serious. I have suffered from anxiety for over a decade but I'm well attuned to that to identify that it isn't the issue here. At least I don't think it is. This has kind of sprung out of nowhere as I was fine a week ago. I'm not under any stress. I thought it might be reflux but I don't know. I do suffer from that also but have never experienced anything remotely close to this.



Any help would be greatly appreciated.