At 3: 30 am I touched my boyfriend's private area for few minutes there was no sperm or pre cum on either mine or his hands then I washed my hands thoroughly. Afterwards he washed his hands twice as well. After this his hands came in contact with many surfaces such as doors, bedsheets, quilts, utensils etc. All this time he did not touch his private area even once. After one and half hours at 5 am he touched my vagina for few seconds there was nothing on his fingers, is there is a chance of pregnancy?