Hello
Thanks for writing to us with your health concern.
Did you have any vaginal penetrative intercourse ?
If the answer is no, with or without precum, there is no chance of
pregnancy.
Regarding the incident you described, about the tissue and the drop of precum on the thigh, there is NO CHANCE that it would lead to a pregnancy.
Also, washing yourself after the blowjob will not lead to pregnancy.
None of the scenarios carry a risk of a pregnancy.
SO stop worrying.
The only way to get pregnant is to have vaginal penetration during intercourse.
Other than that, it is futile to
stress out.
If you have vaginal sex, stay protected.
Take care.
All the best.