They say good "fortune" runs in cycles, do you believe this?

I was born into a poor family, and my family had loads of issues. I was so determined not to be poor and battle like they did. I worked hard, and I changed my thinking. (My family were negative). I seem to have had cycles where I chose jobs and battled and made it good, then moved to another job and did poorly.

This happened in 2005 in a big way. Plus I was diagnosed as depressed (amongst other things). Now I have started a new job and the last few years haunt me, I keep saying to myself “I won’t make it again, this time it is different” Am I causing my own downfall?

I guess I am asking, how do I get out of the current bad cycle, is it my thinking? something I am doing? allowing past issues to cause more issues?

thanks for your insight.