This patient support community is for discussions relating to the challenges of parenting teens (age 12-17), including physical, emotional, and cognitive development, handling peer pressure, activities & sports, choosing a college, and relationships.
If you wait very long to tell them, you will be outside the legal abortion timeframe. I don't know if you're considering that as an option. Just a thought.
I will tell you, as a mother of kids your age, this will cause your parents so much pain. I know your focus is on how "mad" they will be at you, but I'm telling you, your parents will hold each other and cry in each other's arms that this happened. They will hurt for you, and hurt for themselves, and doubt themselves as parents, and they will have anxiety and they will be so angry they can't even look at you.
Your parents love you and want the best for you. That's why they are strict. I don't ever understand parents who get all giddy when their high school daughters get knocked up - because that's lunacy.
I think you should tell them now. And tell them that if they want to get through graduation with all the relatives not knowing, you'll go with that. Tell them, trust them to know how to handle it.