Sex after baby

Hi! Si its been almost 8 months since we had a baby and cant bring myself to want to have sex anymore. I mean we do it but im just not into it at all i basically just do it because i feel bad for my husband. With my first baby it wasnt like this... now i dread it at all times. Im never in the mood and its just not what i want to do. Is this normal? Im worried ill never feel like having sex again. My marriage is very important for me im worried this will take a toll on us...