Hi Claudia and welcome to HW and the RA forum.
Im not sure that when you have RA that there would be any 'pain-free' days more like 'less pain' days and that is achieved with the right meds.
There are a lot of forum members who have families, work and other commitments and I dont understand how anyone does it (including me lol) but again its back to finding the right meds for you.
This disease can make you feel all is hopeless, at one time or another, but when you have good days you realise things aren't that bad.
Hopefully Remicade is the med for you to achieve those 'less pain' days and as scary as some of these meds are, to me I take them for quality of life.
Good luck and keep us posted on how you are going.