Lately my relationship with my girlfriend has been better then ever weve had rough times and great ones and im having great ones currently.. But the other day i was worrying about money seeing as i might not be able to buy her a christmas gift, I then fell into this hole of doubt it seems sorta just doubting our whole relationship for no reason.. am fine now and things with her are still great but when im not talking to her or with her i feel the doubt again like its not gonna work out anymore but for no reason at all?? please help i do not know whats wrong with me also on the first day of this happeneing i took a tylenol cold medication could one of the side effects be what i felt?