Sweety, first of all how old are you? Why do you suspect that your family thinks your pregnant? Is it that obvious? How far along do you think you might be? If it is that obvious that you might be pregnant then the cat is out of the bag with your family and you might as well confess to your mom. You might be surprised that your family won’t freak out on you as you think they will. The bottom line is that you need the help, you don’t even know for sure if you are pregnant and you need to find out if you are, so if your mom can help you get the test and such then you need to tell her.