Motherhood is not what I thought it would be

I have a 15 month old who I love beyond words. He is my world. However he is very difficult and still does not sleep. I'm so tired and taxed I don't think I could do this ever again which constantly makes me sad because I've always dreamed of having two kids. I just don't ever see choosing to do this again being in the best interest for me or him. Not to mention recovery has been so hard and I feel like I barely get anytime with my husband. Is anyone else in the same boat?