Hi A.,
Breastfeeding is hard, but can be so worth it! I have two boys and breastfed the first one for 15 months, the second one for 22 months (he would still be on the boob if I hadn't weaned him.
I did not have an easy experience my first time around, but knew much more my second time.
Also, I have large breasts, and I can guarantee that no mother has ever smothered her baby with her breast, so relax.
Here are some tips:
Buy "The Nursing Mother's Companion" by Kathleen Huggins. It is an invaluable resource.
Get with your local hospital and find a good lactation specialist. Breastfeeding has to be learned by both you and your baby. Even with my second son, it took a good two months to get it down.l
If you live too far away from a lactation specialist, then call your local "La Leche Leage". You may want to call them anyways. I found you can use all the support you can get.
This is important: Your pediatrician and doctor have to be "pro breastfeeding". This means that they don't give you advice like "it is silly to continue to struggle". If it is important to you to be successful, then you need to give it more time, and you need to have a supportive doc. I switched from my first doc when I was having problems, because he told me to give my son the bottle. From everything I had read, I knew if I followed his advice, that would have been the beginning of the end of breastfeeding.
Join a breastfeeding support group! Talking with other moms, who are in the same boat, makes you feel less alone. Remember, as a whole, our society is not supportive of breastfeeding. Surround yourself with people who are.
Learn to relax. Don't beat yourself up too much. Any time spent breastfeeding your baby is beneficial to both of you. Breastfeeding takes time to learn and time to do. The important thing is the time spent holding your baby, bonding, etc. Get help with the older girls, so you can spend time with the baby.
Take care of yourself. Eat healthy, make sure you get lots of fluids, and sleep when you can.
Also, off of the breastfeeding subject... Sounds like you have alot on your plate. Raising three children while working and going to school... Can you put some things on the back burner? Remember, your girls are only little for a short time, so spend time with them while you can.
Good luck! And may you have an easy labor and delivery!
T.