How long TTC before BFP?

I'm curious because after being on birth control for 10 years im in my second cycle of TTC. I keep hearing that it can take a very long time. I just found out I have endometriosis and I'm hoping it doesn't cause too many issues. My mother got pregnant with my sister and I on her first try with both and my sisters pregnant with her third and got prego first try with all 3. I'm already not following that pattern :-(