What do I do if I get really aroused during an exposure

So?

Arousal is nothing but a sensation in your body! We create meaning that we add to the sensation, but in reality it is just a sensation. Try some mindfulness meditation where you just watch the sensations come and go without adding meaning to it!

Of course. I’ve been through this and a key to getting through it was the mindfulness and just watching the arousal (or lack thereof) after an exposure and doing everything I could to not analyze it or apply meaning to it! Read up on some mindfulness techniques like body scans. Also The Mindfulness Workbook for OCD is so good! And so it the ACT workbook written by Russ Harris. It’s not specifically about OCD but has good activities for practicing mindful acceptance.