Same here (with my chest-cath) : it took about two weeks to stop hurting & start with the healing-process & stop bleeding & it also took my body a while (~ two weeks) to "get used to it" & since then it has been alright without any pain. (Touch wood it continues like that...)
The most important point is not to let any water come across the access and keep it safely protected & sanitary clean at all times.
Good luck wishes from Kristina.