70 Joules Fraxel Setting Too Strong?

I had 2 Fraxel laser treaments both of them done with 6 passes all over the face but the second one was done at the setting of 70 joules. Is that to strong? She said that was the strongest setting. I am worried that 70 joules and 6 passes can that cause damage underneath the skin now or in the future, like damaging the collagen such that my face becomes saggy or lumpy because the settings were so high. Is 70 joules common setting? I do have some problem now my lips are swollen.