HELP PLEASE, CAT PREGNANCY ISSUES!?

My cat got pregant the first time she was in heat about month and half or two, well now something has gone really wrong, I think. This is the first time I've ever have had a pregant cat so I don't really know what to do until the babys are born. Every thing was fine til yesterday night, she started mewling loudly and writhing around on the floor like she did when she was in heat, I asked my mom and she said she was going into labor, so I took her into my room and got her comfortable. She began to puke over and over again, then she acidently pooped in my room (she house and litter trained) she continued puking and writhing all night, but then she started sitting up on her hind legs and staring off into space for hours and puking everynow then, this continued until five a.m. when she calmed downed and went to sleep but was whezzing and breathing really hard, today she seemed fine when I got home from school, but later, around seven, she started doing the same thing, I tried to get her comfortable but she won't stay still anywhere, shes drags herself around the room by her front feet, she is also panting but won't drink when I put a water bowl next to her face, nothing I'm doing is helping, is this normal? what can I do to help besides see a vet, my mom dosen't have enought money for one? I can't stand seeing her so miserable, please help, real answers, I'm terrified, also telling me I shouldn't have animals if I don't have enough money for a vet isn't going to help anything, the cat, and I both already feel bad enough.