DROWZZY

I am 35 year old female.
my condition started 5 month back after i had my 2nd delivary. it was normal vaginal dellivary with epidural anasthsia( it was difficult insertion of epidural catheter 2 times failed and inserted in 3rd time with dificulty) 5 days after delivery i developed symptomayic bradycardia heart rate was 35-42/ min,generalized odema, palpitation ,dizziness, blurring and chest tigghtness with cough and since of fatigue.
at that time investigation done show :
Blood :  complete blood count "normal", liver function,  kideny function, CRP, ESR,thyroid function , immunoglobulins, bichemestry" Ca, Mg, K"  all were  normal.
D Dimer was high 5000 but came normal after about one month 200
all
spiral chest CT  " normal study", abdominal ultrasound "normal study", lower limb doppler "normal".
Holter show sinus bradycardia, Tred Mel show hear rate acceleration, Echocardiography show mild regergitation in 3 valve and incraese in pulmonary pressure" 45" which imrove later except mild TR
D Dimer was high 5000 but came normal after about one month 200
I was slowly imropving my heart rate became 60 and symptoms decrease but since one month i started to have sever drowsness, heavy head like bag of water, some times i feel fullness of the ears, some times in the left ear and others right ear and some times with tenittus.  
I feel fatigue i can not carry my self like walking in sand or water or walking againest gravity.
if drowzziness increase i feel tight chest, burning in suprasternal area and like burning in trachea, i can take my breath but i feel it is heavy ,my head  is heavy and i may feel numbness in occipital area like no blood is reaching my brain.
i can not withstand noise , and my eyes movement if i look around increase drowsiness and i feel i move my eyes with difficulty and its painfull.
i repeat holter  which show sinus brady cardia '45" minimum heart rate most of the time with max heart rate 120, stress ECG and Echo all within normal,blood pressure 105/ 65 average lowest was 92/50
blood investigations were normal
ANA weak positive, rheumatic factor 23 (normal max 20)
eye examination, fundus,retina and field all normal
ENT examination show benign paroxismal veritigo
i have base line of dizziness but it increases now even without that much effort.and some times i feel better but for very short time
please help