i have pain in back heart palpitation pain and numbness in arms and fingers pain in left eye pain in left knee and left foot slightly swollen. afraid may be having minor stroke or a clot somewhere. had palpitations in early march after riding a bike. then after taking a sea salt flush which lowered my potassium. I went the doctor in early March and they did a scan on my heart and an xray on my chest and found nothing. I thought until now they were panic attacks so I didn't follow up with my doctor for the stress test I was supposed to take. Could this be symptoms of a possible stroke. Also I have an elevated cholesterol level of 275 last I check and haven't been on a consistent diet to lower it.