Feeling depressed and exhausted!

Honestly i hope you don't mind but i just need to talk. This is my first pregnancy and i am 8w6d and at first i kept thinking wow my pregnancy could be a whole lot worse i haven't puked but twice I'm not tired all the time and i can eat, overal i felt it could be worse....perhaps i spoke too soon though. I have been feeling so depressed and alone and tired. My husband comes home from work and holds me and i still feel aweful. Then i end up crying because he has to go back to work. I babysit and i don't think I'm okay to be babysitting anymore but my husband says I'll be okay and the lady i babysit for has told me she'll start using her backup more often. I want to feel better! Anyone know what i can do? Or if there is anything at all i can do?