Husband gets mad at me when i want to take birthing and breastfeeding classes...ughh!

Okay so my last pregnancy I went to this free pregnancy center that offers all types if different classes and you can earn baby bucks(money with a pic of a baby) and they have a "shop" that is filled with baby items that you can buy with the baby bucks you earn. Well last pregnancy I took 7 classes and then had a miscarriage. This pregnancy I had made two separate appointments and I didn't show to either of them cause my husband thought the classes were useless and boring and ect... Well I had went and made another appointment for Tomorrow(Thursday) and he is going on and on about how I dont need the birthing and breastfeeding classes..that I'm a woman and it should come natural to me. And with the breastfeeding he says all I have to do is squeeze my boob and let the baby suck on it....I'm nervous. Its my first child and I only have about 5 1/2 weeks left. He is also complaining how he doesnt want to take off of work for something so useless. What is his damn problem?!? I told him that if he doesnt want to come home an hour early to take me..that I'll just walk! Ughhh!! So frustrating