touched himself then touched me, pregnant?

So yesterday, my boyfriend was masturbating and I noticed a little precum seeping out. I wiped it off. Then he continued to masturbate but didn't ejaculate at all. He then proceeded to spit on the same hand he used and fingered me. Could I be pregnant? He said he was sure his hand was dry before he fingered me so I guess he dried his hand. My concern is, if more precum had seeped out while he masturbated, and he spit on the same hand, would sperm survive in the saliva and get me pregnant when he fingered me?