Is it normal to send thank you cards to everyone that showed up to my baby shower and got me…

Is it normal to send thank you cards to everyone that showed up to my baby shower and got me something..? My Nina and aunt threw me a baby shower I really didn't want and she made it a statement in front of everyone to tell me she wrote down everyone's address and name of who got me something and bought me thank you cards just for me to send them to everyone. I mean I don't have a problem doing it, I wish she would've bought the damn stamps too, but I haven't gotten around to doing it yet I have more on my plate right now, but is it normal to do that? I don't remember my sister having to do it at hers.