also witch hazel on a cold pad can do wonders, usually after birth they shrink due to your bowel getting back to normal and there being alot let pressure as well
Having hemmeroids isn't a serious issue (at least not usually), it's just uncomfortable. Having them won't have any impact on the birth at all. If you have them, talk to your Dr. about relief option. I believe most over the counter remedies are safe during pregnancy, but I don't know that for absolute certainty. Your Dr. can recommend something safe for you to use.