Thank you for writing.
Anytime you research online, you'll get a variety of answers.
The facts are that you didn't engage in sex and there was no ejaculation. But men can't tell if they have pre-ejaculate or not, unless they actually check. Pre-ejaculate itself does not contain any sperm. Sperm may be inside the urethra if a man ejaculated recently and did not urinate since. If he urinated since he last ejaculated, there is no sperm at all. Pregnancy is very uncommon from pre-ejaculate and the urethra would have to contain sperm at the same time. A woman would also have to be ovulating and engage in unprotected intercourse with ejaculation.
There is really no risk in your case. My advice is to let this go and not to research anymore; you will get so many varied (and fake stories) that it's not worth it.
If you do have OCD/anxiety, you need to stop having unprotected sexual activity.