Could I of gotten sick from this?

I'm a pretty hygienic girl and I shower often, clean my house often, and wash my comforter, sheets, and pillow cases plenty...

I just realized that I don't think I've washed my mattress pad in over a year... I'm going to wash it tonight once I get the sheets out of the laundry but it really got me thinking.. even though my body doesn't touch it, could I of gotten something from it?
Could I of gotten sick from this?
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