Oh no....I'm really sorry.

I lost a baby BN to my filter awhile ago and felt just terrible too. Not suicide, but Plecos are very attracted to strong water flow, so often head for the filter outflow.
My newest little BN did the same thing, but he was small enough to get in the filter under the Bio wheel and I found him inside the filter unharmed.
I then cut a piece of craft canvas the right size to fit on the lip of the filter outflow (without touching the wheel) and elastic banded it into place. This forms a little fence that my pleco can't get over.
If you decide to get another little pleco, you could do the same.