I said the worst thing ever to my husband.......

So I'm feeling pretty bad and maybe just need to share this with a group of strangers. I'm 22 weeks pregnant, been working full-time on my feet, and do the majority of the chores and cooking around the house. Pre-pregnancy I've always struggled with how to talk to my husband about helping me. We've had some talks and sometimes they help but it never lasts. Now I'm getting bigger and bigger, still doing all the house things, and so worried about what will happen once baby gets here. I am bad and tend to internalize it, get angry, think terrible thoughts in my head while cleaning/cooking, etc. So last night it finally came to a head. I did ask for his help with cooking which he did. Afterward he took care of his plate only, typical, and sat down to relax. Now I'm cleaning the whole kitchen and dishes just fuming. I finally let the kettle pop and go off on him. I start by first saying, "you know when baby gets here you're really going to have to start helping me more around here. I'm not going to have all the time and energy to do all of this plus care for and feed baby. I'm not sure if you don't notice or just don't care but if you don't help me I'll leave and take baby and find someone who does care!" and that was it, I said it. He heard mostly just that and it killed him. It hurt him. He was in shock and disbelief. I tried to take it back, I keep apologizing but the words were said and I can't go back. We also discussed why I said it and him helping more which is good. We both agreed to work on ourselves to not get to that point but I still feel horrible and like I changed something in us. Of course I didn't mean it, I only want him to raise our baby and he's so excited to be a dad. I guess I'm just sharing this to get it out and also wonder if anyone else has gone through this and can offer any advice for me to make it up to him?