stressing out

so I'm 8 weeks as of today and considered high risk because of diabetes . I've had a miscarriage in

december, been wanting a baby for awhile now. I was in such disbelief and still kinda am. I've been with my fiance now for 4 years, he's 28, and hard working. I'm 30 and work and go to school. we were planning on getting married November of 2018. well we weren't planning on this and my doctor said because I was taking metformin it made my super fertile. so here I am pregnant. I've told my mother instantly and she was happy. it's his side that I'm extremely worried about. They're all old school catholics, especially his grandparents. we're both so terrified to tell them. his grandma wants his to have a perfect job, to marry, travel and make alot of money before any children but he doesn't care about traveling and loves the ideal of a family. We're unsure how to go about telling them. he's so sure his grandparents are going to hate him and he or I ruined his life. please help me out with advice and please no negativity.