she was probably not pregnant as pregancy only lasts a short period, say 2 to 3 weeks,
she is more than likely to have stored the sperm until needed.
if they are white and plump, they are probably still good.
get the female out until you can get the eggs out, she may roll them other or trample on them.
the best thing to do is probably use the water method of incubation.
make something simular to a sims container, with water below and place in an area of 30 degrees until you can get something else up and running