Getting over initial regret?

As soon as I retained my lawyer and paid, I felt immediate regret. Every ounce of doubt came pouring into my head and I really don't know if I'm making the right choice or not. It's truly eating me alive. I told them to pause and not file yet.

Is it normal to feel like this in the beginning? Of course, my spouse isn't helping by saying how much this will mess our kids up, going from 2 incomes to 1 we won't be able to give them a life they deserve..

But I'm just not happy? There was infidelity on my spouses part, we've did therapy since then, but I still just feel meh about him. Of course, having 2 kids in the mix doesn't help because thinking of losing half my time with them kills me too.

I think I'm just rambling and venting. I wish the answer was as clear as day but it's just muddy water for me 💔