Any know anything about follicle counting?

Erica

So me and my husband have been ttc for almost 7 years now. I went today for an ultrasound so my doctor could do a follicle count and they said one was super thick and way more mature than it should be with me only being on cd 6 so she put me on birth control pills (I haven’t been on any birth control in like 6 years) for 2 months or until it thins out a bit and she is gonna do another ultrasound on February 15th to see what it looks like then but does anyone have any idea if this is good or not? It’s my first time checking these out. I’ve already done the hsg test back in April 2023 and that checked out good with no blockages. I just don’t know what any of these numbers mean. I’m so lost.