Diziness and weakness muscle. Diagnosis.

I'm been suffering from vibrations or tremors in my body especially those legs internally, since weeks.Though I find difficult to concentrate in my work due to improper breathing,vison-blurness,fatigue,etc.Dont know what the cause is.I started taking Renerve plus two days ago.I ain't sure, whether I would work or not.Muscles are loosened now.It all started as a simple beating or racing or fluttering in my chest a month ago.Initially I thought I might be due to acidity, so took PPIs only for 4-6 days once.That did only fixed my pounding heart to some extent.I don't have any fever,cough,cold,etc.But at many i have headaches though.Please doctor evaluate this issue as quick as possible and prescribe some medications and tips.As there were lockdowns,so I can't afford to go out for proper diagnosis.