I feel like were not the same as before?

Me and my husband (married a couple of months) we already have a son and wanted another little one. I am now 12weeks pregnant and ive never felt so down about are relationship! I am so crazy about him and i know he is about me, but he really doesnt show it anymore. He doesnt seem to understand that i really dont have any energy at the moment and ive only just stopped feeling sick consently. I dont want loads of sympathy just want him to understand that i dont feel myself at the minute. He keeps saying things and it really hurts. He doesnt even seem that bothered that were having a baby when he pestered me for ages about having another. I just dont understand its really hurting me.