Pregnancy Risk. In this instance?

My boyfriend and I had protected sex and he orgasmed. About 20 minutes later we started again with mutual masturbation and his penis was dry, he no longer had a condom on I did not see any semen left over from the previous ejaculation. As we were mutually masturbating each other he briefly (seconds) touched his penis before starting to finger me again. He had not orgasmed at this point from the masturbation and there was no wet or visible semen on his shaft (where he touched) I'm worried about the risk of pregnancy in this instance. To Recap, he had orgasmed previous to the masturbation but there was no visible or wet cum left over. During masturbation his penis was still dry but I occasionally felt precum but this dried quickly as there was no lube. He touched his shaft at one point (it was dry) he then fingered me...should I be worrying about pregnancy in this instance?