Proofing not proofing much
I mixed up some dough last night, mostly just KA bread flour and freshly milled Spelt grain. 60% BF and 40% Spelt. I used my wild yeast starter, added some honey and diastatic Malt... left in garage overnight (39 F.) for retarding dough after a good hour or two of autolysing. This morning I noticed the bread did not move much.. hardly any bubbles forming. So, I heated up the oven (150 F.) and let it sit there for about 1/2 hour then let it all sit in sun. Still not proofing much. Not sure what to do. Can I add some dry yeast now? Perhaps I killed off the yeast in the oven but I doubt it. The dough was cold when I put it in and it did not stay in too long.
Any suggestions? How can I salvage this dough? If I do nothing and it does not rise, I feel I have to add dry yeast or this becomes nothing but a trip to the trash. It's been at room temperature for about 3 hours now.