Pick a time when you're not testy to bring this up to your husband. It's vital that you communicate your stress to him in a non-accusatory way. Keep it about yourself, and how you feel. For example, "I feel so overwhelmed taking care of the kids all day! I'm so stressed, and it makes me really grumpy!" Watch your wording, it's important!
Then ask him for help. Men love to fix things, including problems. Ask him if he has a solution to help you out. This is the perfect time to see the knight hiding in there pop out to rescue you! Hopefully it will be his idea, but you can steer him toward being more involved when he comes home from work.
Maybe you could take turns with "wind down time." I like the previous poster's idea about letting him have a few minutes to wind down when he comes home, and you pretending he's not home yet (although with as much stress as you're under, you may want to ask him for only 15 since he had the drive home to wind down, too). Then you can trade, and you can take some time to yourself to just sit and relax. Lock yourself in the bathroom, read a good book, step outside and enjoy the sunshine, take a long shower... do something for YOU in this time. It will energize you and get you ready to be involved again.
A lot of times (if your husband is anything like mine) he might need reminders about "his idea." Instead of wording it as you did ("Am I the only one that hears him cry?"), practice saying VERY SWEETLY, "Honey, I could really use your help right now. I'm starting to get stressed again." Your tone and wording will help him feel respected, appreciated and needed. After all, we catch more flies with honey than vinegar, right?
Over the long term, see if you can do things to delegate so you're not so overwhelmed. Is your older child old enough to help you around the house? Like giving him/her chores like sorting clothes, feeding pets, and the such? As part of your stress-relief plan, can your knight in shining armor take over doing the dishes or picking up the livingroom (on a permanent basis)?
Do you have a friend who also has children, and you can "trade" on some days... you watch her kids for an hour or two, then another day of the week she watches yours for an hour or two? This would also give you some "me-time" that would help rejuvenate you and keep you sane! (And don't we all need it!)
I hope you are able to de-stress sometime soon! I remember the days when my two were very little (they're 1 1/2 years apart) and how stressed I was! Good luck to you!