Guess all I have is this now

So today at work the girl who is 14-15 weeks is asking me how I like her new maternity clothes and holding her belly. I just smiled and changed the subject. Then one of my other staff told me their wife is pregnant again. I vented to my best friend and she said you’re being insensitive to those who can’t even conceive one child. Wtf? This isn’t easy regardless if I have a kid or not. Sometimes I think it would be easier if it were my first. I wouldn’t know what it was like to get pregnant the first month. I wouldn’t have a son asking me when his baby sister is coming out of my belly. I’m a little resentful of my husband since his diet and life habits don’t help his motility issues. I’m not sure if that’s just him or his life style but I tried to get him to be healthy in December when we started. Now that we are going to see a specialist he’s trying to be healthy. After I’ve spent so much money on stork otc, preseed, opks, pregnancy tests, etc. I guess the only ones who understand are those who have a kid and are struggling to have another. Glad I have support or understanding somewhere.