Probably not. I do have some masks that have a place for an extra filter, but I haven’t used it although I do have the extra strong blue paper towels for it.
I do sometimes wear a mask and a shield at the same time when I feel I am in a higher risk situation. When I go to the doctor I usually do this. I should do it in my post office, because there is always a no-masker in there, and it is a mini small room.
I have some KN95 masks that are supposed to be better for self protection.
My personal opinion is if everyone wears a mask then that is the ideal, rather than double masks for some and no masks on others.
I just saw on TV this morning someone (some medical professional, I can’t remember which one, but one of the respected ones often on TV) say that double mask can run the risk of more air escaping from the sides because the air does not flow enough through the mask.
I am rarely in very high risk situations for extended periods luckily.