I feel very silly asking this question but wondered if anyone could help shed some light! 
I made a beef stew yesterday in the slow cooked (seared meat first then put in all in for 6 hours). We actually never got round to eating it as met with friends, therefore when we got back I turned off the slow cooker and transferred the stew into a large bowl and covered with cellophane..
The stew had not cooked down by the time we went to bed, therefore I left it out (covered) to cool overnight and then put it in the fridge as soon as I was up this morning at 7am.
It's still in the fridge and we were hoping for dinner tonight.... is this safe to eat?? How should we reheat if so, on the hob?
I'm 7 months pregnant so just want to be on the safe side!
Thanks in advance!