Should my boyfriend be upset with me for being emotional and withdrawn after I had a miscarriage?

I didn't want to get pregnant but I did anyways. The miscarriage was terrifying and painful and really hurt me physically and emotionally, so I've been more closed off these past few weeks. My boyfriend says that is enough to justify being upset with me, but I really think that's an unfair opinion considering that he didn't have to go through any of this, and didn't ever ask if I was okay or ever check up on me.