Totally normal.
It seems to me that being an at home mom does not mean being at home. Get out of the house and make playdates with other moms you think you would like to get to know. When I had my first child and we moved to a new area, on Sunday evenings, I'd get on the phone and make a playdate for every day of the week. 1.5 hours was enough for my little one. I'd invite someone over or she'd invite me or we'd meet somewhere. Don't let the state of your house keep you from seeing people - it is the only way I clean up at all! Investing in an annual membership at a 'children's museum' is a great way to get out and see other families. The library story hour is, too. Introduce yourself to another mom. Say, "We'll be here next week - see you then." This way you get to see peers and the babies are occupied.
I found my children much more interesting once they could talk and we could interact more. But I was committed to raising them myself. So I had to find a way to enjoy myself in ways that were also supportive of them. Playdates with moms I wanted to have a cup of coffee with was the perfect solution - and my kids loved other people's houses and toys, too.
Lastly, I think there is an idea that there is something I can DO to make me fulfilled - whether it is work for money, being at home with ones children, shopping, having a manicure or being in great physical shape. It seems none of this works. For me, I find that I am at peace in various circumstances when I go before God and tell him everything I am thinking, worried about, wondering about, and literally place it all at the food of the Cross. And leave it there, in his tender mercy. Then, I try to help others who might be more lonely, more isolated, more feeling like they don't have any friends than me.
I hope this helps.
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