Dodedoo-
Intrusive thoughts can take many different forms and different people have different intrusive thoughts, but they're all just intrusive thoughts. If you're not already seeing a CBT for your OCD, it's probably a good idea to find a CBT in your area who can work with you to develop strategies to control your OCD.
You said that during times of high anxiety and stress your intrusive thoughts are worse, and that holds true for me too, as it does for many of us that have OCD. Most Psychologists will tell you that stress is directly related to an increase in OCD moments becuase we're experiencing all these feelings, whether they're scary or happy feelings.
I started driving with a new company this past Monday and no matter how long you've been driving a semi, they always put you with a trainer. So I was not familiar with the docks that I would be delivering too, although my trainer was. He wanted to see how well I did backing into a tough dock that wasn't straight, so he got out of the truck and was watching me. I hate it when people watch me because it makes me so nervous. Well after bumping the wall, and tipping over a few pallets in the back of my truck, I finally got the truck docked, but during that time I could see the expression on his face and he wasn't very happy. I apologized and went on with my day.
Later as soon as I left work on the way home I started having intrusive thoughts flood in like crazy, and although it was hours after the incident, I was having them anyway. This was because my brain was too busy concentrating on work and what I had to do, rather than thinking about OCD. When we're at rest or not using our brains, our intrusive thoughts will also flood in, especially if it's after a time where we know we cannot afford to use up anymore brain energy. So basically when I was nervous and backing up my truck and my OCD started I just told it to shut up, but OCD is resilient and later it came back, and when it did I dealt with it by saying that I had a tough day, and sometimes you have a tough day at work, and tomorrow would be better.
Hope this helps.