Mansion 100k: top pair weak kicker

[AllinDan]

This hand happened a few days ago, and Mansion doesn't write hh to the hd, but I think I've got relevant details right.

I've just been moved to the table, I think this is my 2nd hand. We're at the start of the 2nd hour and not much has happened for me.

Starting Stack 2500, most of the field is still around.

I have ~3000, most of the table has me covered, including villain.

Blinds 75/150

folds to me, I open for 400 in the co with A8o.

btn+sb fold, bb calls.

Flop A36 rainbow. (875)

bb bets 800. . .

I have 2600 back, pot is now 1700-

what do I do? wtf does a pot sized lead into my pfr mean here? set? draw? I'm lost-help!