Please help! I'm so sad!

Here I am crying all alone because I can't basically share this with anybody...we have a 3 1/2 year old daughter and there's nothing in the world I want more than to be able to give her a brother or a sister! So here I am doing all my homework, I got the clearblue monitor, I am taking all my vitamins  and folic acid and I even got Glow just to make sure. To make a long story short my husband (only 31 years old and 3 years younger than me) has erectile problems almost always that's why I never saw him crazy wanting sex but he is too embarrassed to actually do something about it and I love him crazy, but I just don't know what to