Do you think l have a heart and or thyroid problem?
l went to the doctor and the first time my pulse was 120(high) then he checked it again and it went down to 108 which is not that bad.

During pulse measurement, please make sure of the following: 1) you are not nervous and irritated 2) you did not smoke a cigarette for more than 30 minutes 3) No coffee or tea as they have a positive effect on your pulse.

108 is not normal! Buy a home blood pressure monitor (good quality so it can be accurate) and check regularly. These monitors measure you blood pressure and pulse

Bad breath is a sign of a lack of potassium phosphate in the body..these are obtainable from health shops homeopathically and are inexpensive.they are Dr Schuesslers Tissue Salts..in Kali Phos.
maybe your pulse is high too because of the stress you have in the fear of a heart or thyroid problem..