How to deal with unsupportive family?

I am currently pregnant with my 2nd child, I had my first at 17 and my husband (bf at the time) got our stuff together fast for our son. My husband and I have our own house, 2 vehicles and he has a steady job. My husband and I tried for our second. Im only 5 weeks now but Im not excited to tell my side of the family when the time comes, they always referred to my son as a mistake and its like they expected him to be my only child because I had him so young. Everytime Ive been sick the past 2 years its "please tell me you arent pregnant." Did anyone else have this issue?