Your not far enough along for it to be amniotic fluid. Your little bean plus all it's parts (sac, placenta, fluid) is still extremely small (everything about the size of an apple seed).
You need to tell your parents NOW. You need prenatal care.
If you are miscarrying, you will know. It is very heavy bleeding, with large clots. There is no tell tale sign that you are GOING to miscarry. Unfortunately, if it happens, there is nothing you can do about it