[Carth]

Way too soon to get another dog mate.
Staying in is probably best, but you need to do mundane things to take you're mind off the loss.
Watch TV, bake a cake, do a jigsaw, spring clean, decorate a room, anything that will stop the mind dwelling on the 'wrong' thing.

Time, as they say, is the great healer, easy to say but hard to get through.