How and when should i tell him we are pregnant...?

It's too early to take a pregnancy test my period isn't due for another 10 days... but all the signs are there that I'm def pregnant... I've had a miscarriage a few years ago and it wrecked me and I'm just afraid of letting him down. He is also between jobs right now so I don't want to add more stress to him but I know I have to tell him. How do I go about breaking the news?