help 😩

i'm 17 yrs old . yesterday after taking 2 pregnancy tests i found out i was pregnant . i was very much in denial so i took another one an hour ago and of course .. the result is still positive . i am very scared . as my father passed away and all i have is my mom who i'm not sure how or when to tell . my mother has an 8 year old of her own and i'm still in high school . the baby's father and i decided against abortion and adoption but i keep myself awake crying at night wondering if i've made the right choice . this took us both by shock . we weren't ready for children until we were at least 35, careers established, and stable finances . we don't even have high school diplomas yet . i'm scared about how much judgement will be passed as we are both very young . baby daddy has agreed to help me, even telling me to stay off of my feet because he'd rather be the one working . i'm thankful he's not running around like a beheaded chicken . but the most important task at hand right now is telling my mom . any piece of advice would be helpful .