Hello WhatDoIDo876, I am glad you have reached out for help, It is hard to do in relationships, especially when you are not sure what to do. In relations to AdeptPeachSquid comment "they" all the time this is wrong. It is a team thing and should be "we". We need to work this out to gether, we need to support each other, we need neeed to solve the issue or concern.
Now as a bloke and fellow dad who has been through this him self I think mums tend to forget the pressures that we as dads have, especially in todays society, when there have been higher exspectations compaired to the old times. It the old days men just worked all hours god send, gave all of the money to the wife to pay the bills and then maybe had a little pocket money and then not ask much but to see smily face from the wife and kids. Now a days it work all hours god send, give the moeny to wife, pay the bills, then help with the house work, help with the kids the pick ups taking to clubs etc listening to all of the womens worrys however rembering not to say anything back because what ever you say is wrong evern if its a posstive comment. and you learn the old frase your dammed if you do and your dammed if you dont.
So here is what I think you need to ask
Firstly how is the sex in your realtionship? lack of it can cause men to withdraw. Due to the lack of it and been rejected all the time as he will start to think what is wrong with me ? I am a fat ? do i not help out enough with the kids or is it that no matter what I do there is no reward. Just beacuse your pregnenet dosnt mean that sex is off the table. Reward your husband evern its a BJ or dressing up ever now and again and have a date night aware from the kids.
Second regognise when he has done something in the house, use the words "thankyou" and "I apreshate you". It helps him to feel more apreahsted. . Maybe make a plan together to clean the house and chors that is fair for each of you. This can help the realationship to be a team effort.
Third body shape , Just as women look in the mirror and says OOOOO I dont like my ass or I dont like boobs and looks a magazien of hot 18-22 year old models and compairing them selfs. Men do this as well. Where as women chat about it openly, men do not. Not to you as it makes them feel week and not to others as he may worrry that people may think he is gay. So what can you do as a partner. Gyms is a great tool to help him feel better. Gyms help create a routeen (which men really like) and a place of saftey. Inshally I went there to loose my wieght as I though that was the problem in our relationship that I was over weight and that my partner didnt feel atracted to me. Didnt tell her this beacuse I was worried about been critsied by her and others. However after been there for 6 months going 3 times a week. I find it has done something to me that i felt it wouldnt do. It has made me more stronger with in my self, I havent lost much wieght but I feel I more able to do things around the house, when my kids say can we do something at the weakend I have the energy to do something about it. I have a lot more better quality of life now.
Forth thing and final is work, you have heard of the term happy wife happy life. I am more working towards happy work happy life. I used to be in a high payed role that yes paid well. However, what it also did was caused me unsessary stress, been called in every weakend to cover sickness and my kids would hardly see me. Did it make me feel guilty, yes it dam well did but I thought I carnt change this. Why? because I have to provide, I want my kids to be able to have the best. Also I felt with in work wise I was essential that with out me the place would not run. Then on one fine day work went bye bye. Thanks for all your done but bye bye. Then I got another jobs , same role though. I started to feel valuble again. Then again bye bye. I learnt then finally that with work you are just a number and relearnt my proritise. That work is just a Job nothing more nothing less. I got a job and it was less paid. However less stress, less hours, less worry . This ment I had more free time to spend with the family, to go to the gym and most importantly to have time for my self and my welbeing. So may be talk about changing jobs,
So I hope this helps.