i had the same thing happen to me bro. how long have been on fina. i found that when i first used fina it didnt happen. but after a while of using it i starting getting a real bad burning taste in my mouth after the injection and sometimes i had to lay down because of pressure in the chest. it might be the fina kit you used, or it might be from long use of it. but dont worry to much, i didnt have any problems because of this. scared the shit out of me but it only lasted about 3 minutes and that was it. but the bad breath thing, i dont know why it lasts for you. mine went away 3-5 minutes later. maybe you think you have bad breath because the taste is still in your mouth. but, listerine strips are not a bad idea anyway. hope this helps.