Im pregnant too and this is my 2nd. I was in all kinds of emotions during my first trimester esp with my first pregnancy and I have this huge expections of what my husband should do just like in the movies.
I remember crying like a child when he refused to buy me a cheese burger
at 2 in the morning while it was raining outside coz I was craving for it. Part of me wasnt really hungry but crying for attention and like you said, validation.
But I soon realized how immature I was after all the tears were gone. Gotta fight that crazy hormones or you are susceptible for post partum depression.
My worst scenario is when I was vomiting at 1am emptying everything I ate the whole day and felt like my gut is gonna come out. My hubby came out of the room and closed the doors. I thought he would come and pat my back or get me a glass of water.
Instead of crying, I yelled at him! He apologized and said, he couldnt really stand it and felt like he is going to throw up as well. Hmmm, not buying it but knowing my husband, I've come to deal with my pregnancy the second time around. These hormonal changes are just symptoms and has nothing to do with my marriage. Just like what the other posters said, just tell your hubby if you need a hug/cuddling for whatever. That shouldnt be asking too much.
Oh, after giving birth, dont be surprised if everyone will be more excited to check the nursery than sit next to you and listen while you moan in pain. People bringing gifts and balloons for the baby and not the mommy. That's just how it is!

But once you see your baby, you couldnt care less.