should I tell him?

Katerina
So I've newly found out I'm pregnant and I should be ecstatic but I'm not cause I've had three miscarriages in the last year or so with the last one at 15 weeks and almost lost my life cause I had a placenta abruption and hemorrhaged. 
Well my question is, should I tell my hubby that I'm pregnant again or wait? I'm so scared to tell him In case I loose this one and don't want him to have to go through another loss again. Plus I know, cause of what we've gone through, he will be so stressed and worried. 
What should I do?