I am guessing that there is MUCH more going on than what you've mentioned here...
Your daughter is the EXACT same age (2 on april 12) as my 3rd child...
Being a parent of young kids is stressful... But it will pass. Potty training will start and then the diapers will be history.
This winter has been long and everyone is feeling a bit of the gloomies and stresses of the financial system right now.
What do you put her down in? Regular pants and a shirt? Try putting a onesie on her BACKWARDS under her pants. :-) See how that works out. But if she really wants to get the diaper off, she will.
My brother in law is one of those that poopy diapers really do make him gag... I have thankfully been married to a man who changes diapers...
What does hubby do if your out and baby needs changing?
You need to tell hubby that you are stressed out right now! You need a night out. No, you don't have to go clubbing, but you could take your books to the library and just sit in the quiet. Go out to get coffee with a friend. Do the grocery shopping. Laundrymat. etc... The biggest part is NO KIDS! Do that at least once a week. Hubby can not read your mind so tell him, "Honey, on which night this week can I ....... , ? (ask sweetly, not like your threatening him) Explain to him that you really just need some mommy time.
Everyone has their own stresses right now. Everyone is worrying about finances. And for some reason guys tend to feel this the most.
In a few weeks the winter will break and we will be able to turn our kids loose outside... And the sun shine will brighten all of our spirits.
It does sound like you are depressed a bit. Many do not know this but postpartum can get you even 2 years after baby is born... If you do feel depressed it could also be a seasonal thing. (need sunlight... is that an excuse to go to the tanning boothe?) If it continues or worsens definently see a dr about it.
Good luck!