We are twins...I struggled trying to do it all on my own for a long time....I finally hired a PT Nanny, which became a FT Nanny after my youngest was severely burned in a terrible accident and required around the clock care...ugh, that was painful.
If I could do it all over again...I would start asking around for a Mother's helper, s/o younger in the neighborhood who can walk to your home, so you don't have yet another pick up/drop off errand to run. There are many young girls who would love to come over and play with baby/toddler while you tend to homework/dinner/meetings.
Then I would still find that PT nanny who can drive and do everything I need to do: shop, cook, clean, drive, laundry, dishes.
Then call your kids teachers and make sure they are in the know about your husband's 2 hr commute. There are many alternatives to the parent teacher conference. Skype from home? Skype from work? Tele conference wherever you are. Try to pop in after school for 15 minutes, email first and make arrangements. The kids can run around the the playground or crawl on the floor while you discuss your child's progress.
You cannot do this alone, especially with your husband's commute, especially in modern, on the go families.
One thought for the future, can you move closer to his work, so he can be home at a more reasonable hour? My husband used to commute for 1 1/2 hours and I swore I would NEVER do that again. So next move and every move hence, I insist on a short commute and the best public school and we research and search for those 2 must haves.
Also, there are many great posts already form overwhelmed mamas:
Here's one:
http://www.mamapedia.com/questions/10658509053749231617