My fiancee is 7 months pregnant, but I'm afraid to tell my mother. Advice?

Wow, you seem like your in quite a stump. Either way she will find out right? And its not like your lying if you don't tell her right away. The best advice I can give you, is keep the baby a secret until your finished with those exams. You have it good, your fiancee will watch the baby as you study, and like you said a baby won't effect you. Prove your mother wrong and show her you made it through the studies with a baby, instead of taking chances with her cutting you off and thus giving you a dimmer future. If she really loves you, she will accept this a year later, especially with knowing you completed your studies, and if she still doesn't accept this, its more of a problem than just the baby "interfering" with your studies, its probably something personal.