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Rumblings can be due to hunger, acidity or as. Tingling and pulse feelings or twitches can be due to dehydration and electrolyte imbalance, muscle fatigue, or pinched nerve due to wrong. Change your posture and drink some fluids and see. Other than this it can be deep vein thrombosis.
I would suggest you consult another doctor for evaluation and get the blood levels of the following checked if they have not already been checked: potassium, calcium, sodium, magnesium, vitamin B complex, or vitamins B1, B3, or B6 and Vitamin D. Generally deficiencies of any of the above can cause muscle twitching and spasms in localized or generalized areas of the body. Get your kidney function, parathyroid gland function and adrenal function tests done because these affect the electrolyte balance in the body.
Stress, alcohol, caffeine and fatigue all cause similar symptoms. Hence if you take alcohol or coffee then cut this down. Sleep at regular hours and see if it helps. Certain sleep disorders and peripheral nerve disorders due to diabetes or hypothyroidism can also be the cause. Please consult your PCP t regarding this as a confirmed diagnosis is not possible on net. Hope this helps. Take care!