Im sorry to hear about your symptoms. Now if you do have sensation of palpitations then it can be due to the heart such as heart arrhythmias. These are abnormal rapid heart rhythms which can cause other symptoms like dizziness, lightheadedness, shortness of breath, chest pain etc. if there are these symptoms as well then you should get an EKG done to have this ruled out.
Another cause of this can be related to a low blood glucose level which can cause these symptoms as well as the weakness. This can be corrected with the help of intake of something sweet like juice etc, you can drink that and see if that helps.
Sometimes you could also be suffering from acid reflux which can cause these sort of symptoms. This can also cause burning in the chest, metallic taste in the mouth, bloating etc. This would be effectively treated with the help of simple OTC prilosec.
Lastly anxiety can also cause symptoms like these and these would need to be controlled with the help of relaxation techniques. If that doesnt work then you would need anxiolytics to control the problem.
Now considering that you do have weakness in the limbs as well as a sensation of a rapid heart beat, i would suggest that you do wake up a family member and try taking some deep breaths and other relaxation techniques. if that isnt working then you should get an EKG done to be on the safe side by visiting urgent care.
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