I accidentally pooed my pants at work, what should I do?!?

I was in front of my boss at work and he scared me, and I accidentally did this huge poo in my pants. He knew it too, (it was pretty obvious) and I quickly walked awkwardly because its WAY closer than the bathroom. Now I'm writing this to work out what I should do, its really obvious, it stinks! And everyone is giving me strange looks, do you think they know? How can I come back to work tomorrow? What will my boss think!? PLEASE HELP! WORST DAY OF MY LIFE!