No Emotions

So after having a miscarriage earlier in the year were finally pregnant we have our 1st ultrasound on the 12th of November I told my husband that we are pregnant and expecting but did not get any type of reaction except for "really" and "ok cool" that's it. Kinda makes me feel bad I want to be excited but with my husband showing no emotion its putting me down. Anyone have a similar issue with your spouse? Anyone have thoughts on maybe why hes being like this?