I've found it generally helps to have a thick skin on the internets, particularly here at mc.com.
NOBODY IS HERE IS REALLY MAKING SERIOUS FUN OF YOU.
However, the more you freak out over this, the closer you move to Danny K. Allen territory, and tbh - we were all making serious fun of him.
Not just because he was a racist troll who thinks that Jesus descended to earth carried by a host of aryan cherubs, but because he was a thin-skinned racist troll who etc, etc, etc.
You could try what I've been trying to teach my son: when someone teases you about something, take whatever it is they're teasing you about and begin incrementing it one step farther until they're the ones who are now uncomfortable. Start with the lumpy mattress. So many possibilities with a used lumpy mattress.