I'm 19 years old ,,, I always feel lightheaded and very dizzy ,and i have a feeling of palpitations and Tachycardia ... i have stomach problems such as feeling of fullness , bloating and feeling Nausea ,, i've asked a doctor since a month ,, he told me that i have Amoebiasis and Ascaris .. I Asked him if i've heart problems or diabetes and if i have to do Endoscopy he told me " no you are alright " .. and he gave me some medicine such as Albendazole , LEVAMISOLE HCL BP , Secnidazole , nifuroxazide , Lactobacillus LB and Antacid ( Rabeprazole Sodium ) ... But after taking the medicine nothing has happened , STILL feeling really dizzy and i always have Tachycardia ... it should be noted that I the first time i had these Symptoms was when i was 15 years old and it took me 4 or 5 months to recover .. and in the day before i was very ill i smoked hash ( it was the first or the second time for me since 3 years ) and i've only smoked one cigarette but i felt very dizzy and Nausea after it ,, but after sleeping i was good but the next day i was ill .