I think you are being a little too impatient. If your baby is a year old that means that you have been trying to conceive for a year or less. Most doctors don't consider a couple infertile unless they have been trying unsuccessfully for at least eighteen months.
Also, if you were on hormonal birth control since your daughter was born, it may take a few months for your fertility to return, especially if you were on the Depo shot.
If you still want to have your husband checked, you can always have his sperm count checked. They will put his ejaculate under the microscope, see how many swimmers he has, and let you know if his sperm are all healthy.