Fedex Says My Package Was Delivered But I Don't See It Anywhere...Help?

I was supposed to get a package today about 15''x10''x10'' big. I've been tracking it and it said the estimated delivery date was today the 22nd but then I checked this morning and it had changed saying it was going to be delivered on the 24th so I didn't see a need to check it again but then the shipper e-mailed me saying he saw it was delivered so I checked outside on my doorstep and nothing was there and then I checked Fedexs' website and sure enough it said "Left at front door. Signature Service not requested." It was being shipped using Home Delivery and I have never had any problems with Fedex before but I checked all around my house and nothing. I don't know if it matters but where getting hit with snow and ice and we usually get packages from Fedex around noon but it said it was delivered at 7:56 P.M. I'm just worried, could it be a glitch? Should I check with neighbors? Thanks