V.S.
I am usually in pain by the end of the day. Back, legs (due to varicose veins), neck, arms, whatever. I have 3 kids too all age 4 and under. I am like you. Exhausted by the end of the day. But by the time I get into bed, I'm not tired. It does get better, but being a stay at home mom, is more exhausting than any other job out there in my opinion. I have lost 15 total lbs from my last pregnancy, now down to normal weight, and a lot was because I don't honestly have time to EAT!!!! Now I get up later. Usually around 7am or after and then it's changing diapers, getting breakfast, doing laundry, doing dishes, cleaning up toys, sweeping (son is crawling and all over the place now), then back to changing, feeding lunch, putting down for naps, changing again and then finally supper, bathtime, changing again before bed and getting ready for bed. Most of the dishes done for supper are luckily done by the dishwasher. I know I am exhausted too. Some days, I cannot even function. It's nice to have support. All I can ask is if maybe you have a family member to help you watch the kids so that you aren't so exhausted. Do you have some extra money so that you can hire some help? Go to sittercity.com and post a free ad about getting care as a helper. Explain the situation and you will be surprised at how many people respond. I got tons of responses when I posted but that was when I was working and needed a new sitter.
Good luck hun and yes, we go through it and get through it. God will never give you more than you can handle. Just ask for HELP!