Pregnancy worries.

How long does it take for cum to dry on a boys hand? and can you get pregnant if he fingers you after it?

if its dry on his hand you wont get pregers but if its still wet and he tries to finger you or something theres a good chance at getting pregnant

I doubt it

Still take the test.

sperm dies after being in the air for around an hour
and yes, you can get pregnant if he fingers you ith sperm on his fingers/hand
to find out if your pregnant take a pregnancy test 2-3 weeks after you had sex
(any sooner and the results won’t be accurate)
in the morning with your first pee is the best time
and take it when your period is due
alternatively, see a doctor for a blood test
this will both let you find out quicker and give you more accurate results