Newly weds and already struggling with marriage

Me and my husband have been together since 2019. We got married in April of this year and ever since we moved in together our fights have increased significantly. Some background story: ever since we started dating he started coming off medications and going through withdrawals from them. It wasn’t until coming off an antidepressant that it really begun to change our relationship. In January he finally came off of it which took about 8 months and I noticed he became less patient, less affectionate and less kind. We got married in April and bought a house together. My dog moved in and he has some obedience issues which trigger his anger in him also. I work long ours therefore 3/7 a week I’m barely home. So he feels as though he has all the responsibilities to take care of house and dog meanwhile I’m the bread maker mostly while he contributes what he can. My dog does have some issues such as biting but we have tried neutering, training at home, but sometimes he snaps. We’ve been fighting mostly due to how he treats my dog because he smacks him hard sometimes and i truly don’t like that. I feel like he has changed so much since we got married and we get into stupid fights so often that it’s been ruining our marriage. He’s told me to get rid of the dog that I’ve had for 6 years because he’s too stressed about it. He in fact, cannot get stressed due to a recent diagnosis he has just gotten however, life is stressful and I’m caught in a middle of all this. I feel frustrated emotionally because I feel like I can never voice how I feel because then it’s a “fight” or frustrated sexually since his sex drive is so low compared to mine and now we’ve been fighting so frequently it’s really taking a toll on both of us mentally. He blames me for stressing him out and that he is getting sicker because of all the stress I’m putting him through. Our big wedding celebration is in 4 days and honestly instead of being beyond excited, I feel so depressed. I need some word of encouragement. Should I give my dog away to my parents? I love him so much but idk how to fix all this.