You exactly knows answer of your question...
The fear you have is sign of ojkshaya and its not recomonded for you do any panchkarma as in pt with fear panchkarma is contraindicated..
Also panchkarma is shodhan chikitsa and for that you need good bal means energy which you lack..
Also your digression is poor so dont go for panchkarma...
Next Steps
start medicine which will work on your digestion first..like hinguvachadi churn or chitrakadi vati
also ojovardhak medicines like vasntkusumakar or makardhwaj will help
go for panchkarma only after regaining some strenght and with good digestive power..
please meet any ayurveda practitioner near you for better understanding..
thank you..