No, no chances of pregnancy. His fingers would have been dry by then and sperm does not live in the air.
But, sweetheart, the portrait you are painting of the sex you are having is so sad, featuring (your word) paranoia, alcohol sprays, coitus substitutes (fingering and blowjobs) and you don't even say if you got to orgasm. ("Then he wanted to finger me again," -- don't you even have agency?) Why not either just get onto the Pill or an IUD so you can have nice, fun, relaxed sex, or dump this boyfriend? You can find one who cares more about you than his horndog needs. (Or, at least, you can find one who cares as much about your happiness as his needs.) Your concerns about STDs and pregnancy might not be "paranoid" as you label them, but they just make the sex you're getting sound forced and boring. If I had to spray myself with alcohol because my partner ejaculated on me, I'd be re-thinking the whole stupid notion of sex. You don't want to do that to yourself. Sex really can be fun, and safe, and rewarding. If you don't have that with this guy, find a guy with whom you feel that way.