Unexpected Health Problem. Do further.

Hello Doctor, I'm 24 Years Male, Since last 6 Months my health is going down unexpectedly. I take regular diet. 10 out 7 Times whenever I eat lunch or dinner I feel nausea while eating and strong vomiting feeling happens. Arms, Wrists, Finger have become thinner, and nerves are visible in arms and fingers and wrists. I'm feeling fatigue and feel tired more often and need sleep more than before but can't have a continuous and relaxed sleep. Earlier I don't had any hairfall but now it's a regular thing and density has also become low and have grown 1/2 inch hair after shaving my head 1 month ago. Suddenly I wake up in the midnight and some times I feel I have fallen down. Please help me doctor, why this could happen and tell me what to do further. Thanks for your help,may you and your family stay safe.