I know what you mean about when things are good and your happy then comes something to take all that away. I never thought that was related to my thought pattern exactly because I thought it was life and shit happens. But I was also brought up with my mother telling me I was an accident and her violent outbursts. So maybe it is related, I notice that I have been in the past the consequences of bringing everything down around me so the one to bring on my own unhappiness because I was suspicious of people and not trusting the closer I got to someone. Coming to an acceptances and breaking free from those patterns have taken alot of years and getting closer to mother earth has helped heal those wounds alot!