nursing strike question

I had a stomach flu over the weekend and I believe a supply drop so I was supplementing LO with formula (I don't have a freezer stash) and now he is refusing to nurse.  I am assuming this is a nursing strike and has to do with preferring the ease of the bottle.  I keep offering the breast but ultimately resorting to the bottle since he is obviously still hungry.  Do I keep offering the breast and hope that he will get over it?  Any advice?  Thanks!