Hopefully everything went well, as you'd be well past 8 weeks now. Any news?
My advice (I guess for anyone else in a similar situation) I'm not sure of your particular situation or whether you should tell your husband in particular or not. I do suggest you tell your support system though, whoever those people might be.
The terrible fact is that miscarriages do happen, but as a woman, that isn't something you should be forced into going through alone. I don't think you want to spend every day for 8-12 weeks agonizing over this. Your support system should be there to help comfort you but equally to help distract you. In the case that you get a miscarriage, having support there is important, it's a crappy situation, nothing will fix it, but sometimes a shoulder to cry on is helpful. Life isn't always fair and quite often life can be sh**, it's important to know yourself well enough to know how to navigate the crappy parts.
So get your friends to support you, eat well, sleep well, talk to your doctor and distract yourself. I hope everything went well!