SLEEP DISTURBANCE & STOMACH/MENTAL PROBLEMS

hi all,is there a relationship between SLEEP DISTURBANCE & STOMACH/MENTAL PROBLEMS. iam having a serious problem with sleep disturbance... just when iam dozzing off, i get a mental palpitation (like heart palpitation, there is some vibration going on in the brain), soon after this i get heart palpitation/angina.... at this point my sleep is totally gone . can anyone tell me what this problem is all about. this has been happening for the past two months almost 3 to 4 times a week. as a result i started getting an eye sag (slight swell under the eyes). Iam told that I have gastritis & slight BP. Iam taking 5mg bisoprolol fumarate pill for BP at night. Master Health Checkup - all parameters seemed OK. iam 46 year old male. can anyone help me to solve my problem...thanks..