I trimmed Abbie's ears (as I recall) in her ninth week. I was soooo nervous. I didn't have clippers, so used a very sharp scissor (I know........BAD me!), and thank God, I didn't snip her! But, I was very careful and took much time with the hair on her ears. It helped that she wasn't tooooooooo squirmy. Anyway, we got the job done, and the next day her ears popped up just from getting the weight of the hair off! Now, I use a moustache trimmer just on the tips. Try doing her when she's sleeping.
Good luck - Be brave - and be CAREFUL!