Dealing with these Emotions

I've told some people about our recent infertility battle. Reactions change among people but one thing is for certain; there has not been a single person that I feel has actually "said the right thing" when I've told them.
One person was confused and said, "Is that even possible after you've already had two children?" Why yes, yes it is. I would know because ITS HAPPENING TO ME!
Most other people have just not reacted at all. A quick, "Im sorry." and then the subject is changed.
For a while, I was feeling like maybe I was making a bigger deal out of this when it wasn't such a big deal. Was I being dramatic or insensitive to those who have a hard time conceiving even their first child? Was this not supposed to bother me because of th two huge beautiful babies I had already been given? I said this to a friend who told me to never apologize for the way I'm feeling. Just because someone else is going through this and they don't have any children yet does not mean that I have no right to grieve.
And then I think about the fact that I could be pregnant this very month, if my fertility drugs and my body work together to make it happen. Should I not have these feelings because it hasn't been along enough? Is there a certain time frame where you can now start complaining about not getting pregnant? I've never had to deal with this and I dont want to hurt the feelings of another person who is having a hard time conceiving.

And not only am I overwhelmed with the fact that it'll take fertility drugs for me to get pregnant now, I am also overwhelmed with such a huge diagnosis and what that means for the rest of my life. My sister gave me the email address for her friend who has had PCOS for a long time. After emailing her a lot of questions, she wrote back and was giving me tips on how to control my hormones and stay healthy. I came to a very scary resolution that this is not something that will just go away. This is something that I will live with for the rest of my life. And I hate that fact.