Is it normal for the yeast infection medicine to come out a little chunky after a couple hours?

yes, this is normal. The suppository or cream will liquefy as it reaches your body temperature. This is why you should use this medication right before going to bed at night so hopefully gravity will keep most of the medication in place but, yes, if you get up to go to the bathroom or whatever, you will notice some of the medication draining out AND as the infection is killed, you will have increased drainage and this discharge will be white and chunky and cottage cheese like.