Looking for some advice

I had my third son in June and had a tubal ligation. I regretted it right away as I felt I may have been irrational and scheduled that because I had a rough pregnancy and I am now not 100% sure that I'm done with kids. I'm only 26 years old. I know that a tubal Reversal isn't covered by insurance and it's expensive. But now I'm wondering if I made a terrible mistake. Everyone is telling me three is enough and we should be happy with them, which we are so grateful for them , we just don't feel done yet. I wish I wouldn't have had it done now and gave myself the option of possibly having a fourth (maybe a girl) later on down the road. My husband is on board with whatever I want to do as we are pretty much on the same page.