AITA for wanting to get a second opinion?

A year and a half ago, my eight year old daughter was diagnosed with precocious puberty. We saw her doctor about it, and we decided with her to pursue medical treatment to, well, delay. The doctor has a standard that she'll only prescribe this treatment for 24 months maximum. At the time, this sounded fine and we started treatment.

We're coming up on the two year mark now and honestly....two years isn't enough. She's still too young. Under this doctor's guidelines, she'll have to fully go through puberty at only nine years old. I know my spouse and I agreed to this doctor's standard and we like her and all, but I think we need to get a second opinion. Her opinion isn't every doctor's opinion, and my daughter deserves more time to just be a kid.

My spouse disagrees. They think that this doctor is perfectly fine, and there's no issue at stopping treatment once the two years is up because nine is within the normal range. They think the side effects will start to outweigh any benefits, and that I'm starting to just be scared that she's growing up and that extending the treatment would just make me/us feel like we have control that we shouldn't.

I don't agree. We've been arguing for days about this every time we're alone, and now their sister and my mom have been dragged into it. Her sister is on my side that she should at least be 10 and that she would have done anything available to prevent her girls from getting it before age 12, and my mom thinks nature needs to "take it's course". My spouse now regrets treatment at all because it's given us "unnatural power" and that we're playing god and need to potentially stop it now. I don't think I'm wrong here. AITA?