Announcement help!!

So me and my so are both still kinda young(I'm 18 and he's 17) and we are now 8 weeks and a day pregnant. We both know neither of our families are going to take this lightly at all. His parents are both pretty strict and mine I just feel like are going to be wry upset and disappointed with me. We are both happy about being pregnant but we know not everyone will be anywhere near how we feel when we announce it.. I also live with his dad and his wife and 4 kids atm and I'm afraid he will be so mad he kicks me out of the house and I will be out of a place to live.. My parents also do not like my so at all for absolutely no reason at all.. We really need some help and advice on how we could announce this to both sides of our family and maybe help them be more supportive about this instead of being extremely angry with us.