Keeping DH in the dark? What would you do?

My DH and I have both experienced miscarriage with a different partner before we met each other. We both want this baby so bad. This will be our third month TTC; in October we were trying, and November AF didn't come. We got a BFN in October and I just figured I was skipping a period in November. I knew my DH was pretty sad about the BFNs before, and I'd mentioned the other times I'd gotten pregnant, urine tests actually never worked all the way up until my miscarriage, I'd had to find out for sure with a blood test. So we just kept tracking the cycle and trying again... Then last Saturday, I got the mumps and had to go to ER, and he asked the doctor for a pregnancy test. a urine test came back negative and I think DH thought I was indeed pregnant, because when the doctor left he got really quiet and I swear he teared up! :( Then when we got home, he left for like three hours. I felt terrible, I didn't knew he'd gotten his hopes up so high, and I'm scared for that to happen again..

I'm debating not taking any tests in front of him, just in case it's a BFN... Obviously if I got a BFP I'd let him know, but I don't want him to be so sad about it again.

What would you do???