Should I tell him???

A year ago I had a miscarrage at 20 weeks!! It was the worse experience of my life. I was praying that I would get pregnant again and start my own family with my boyfriend of 5 years. We have been through hell and back together. I am a recovering addict and have been 3 years sober. I have been so tired lately so I decided to take a test and its POSITIVE 😍😍😍😍 I am so excited but at the same time so scared.. I don't want the same thing to happen to us! I havent told him yet. Do you think I should tell him tonight?!