Yesterday me and my girlfriend were hugging and kissing each other. Later on, I felt like I would ejaculate, so I went to the washroom and ejaculated. That time some small amount of semen was on my finger. I washed it with only water and wiped it. Later on I was rubbing those fingers on her stomach. At that time my fingers were almost dry and then I fingered her while she was wearing her underpants. Is there any chance of pregnancy?