Vitamin D deficiency. Is it ok?

Hello respected Doctors Greetings. My Vit D level is 19. Is it ok? Also I feel very weak and tired. Sometimes burning feet.My CBC is all within limits. My Haemoglobin is 11.4. Three weeks ago I was diagnosed with Typhoid. I have run my thyroid, kft, lft, vit B12..All these tests are normal. B12 is 288.I am not diabetic. Also usg whole abdomen, urine culture n routine, echo 2d and ecg. X-ray pa view. Stool occult normal. CPR tes normal., esr is 65.My BP is always 120/70. My head spins a lot coz of my weakness. Kindly suggest. Lipid profile also normal. I just feel like sleeping. I start feeling short of breath if I do any physical activity. I don't know the cause. 2d echo, tmt and ecg chest x-ray all normal. Serum tests all normal. I have no one to take care of. I am an orphan. I don't want to die so soon. I want to live my life in this beautiful world. Pls guide. Regards