My bf fingered me and he got some of his cum on his fingers about 10 minutes earlier, some of his cum maybe got on my upper leg. my period is about 10 days late could this mean i'm pregnant, or can getting fingered for the first time cause delay?

Late periods do not necessarily imply pregnancy, but when viable sperm enter the vaginal canal there's a chance. At this point take a HPT to answer your question.

Take a home pregnancy test. If the result is negative repeat the test 4-5 days later unless you get a period by then. Use first morning urine and follow the instructions carefully. Wish you good health! If you do not wish to be pregnant, use contraception all the time, every time. Consider implanted contraceptive, or IUD. Practice safe sex. Get HPV vaccine,