They may not like the other women there or they may find their rooms lonely and yet not private enough. Some women, especially if being there wasn't their own idea, feel punished, as if they are there to hide something shameful. Whether you choose to go to a group maternity home has to do with your own family, how much emotional, physical, and financial support they can afford to give you, and what type of community you live in and school you attend. You are the best judge of that. If you can't see yourself living at home while pregnant and going to school, or if you know the whole thing would be too much of a burden on your family, then living in a group home until after the birth might be a good idea.
Many women get weepy during pregnancy.
Being under the strain of having a baby before you are really ready may make this kind of reaction worse. If you are not married, and even if you are and have had bad feelings about how the pregnancy happened, you may feel blue a lot. Maybe you feel angry at yourself and the baby's father for not using birth control. Talk your feelings over with the baby's father, your family, and with your conselor. If you are very young, you may get stares and snickers.