Breastfeeding through fertility treatments?

Au
I had my baby in September, with assistance of fertility treatments. Specifically, femara, ovidrel and <a href="https://glowing.com/glow-fertility-program">IUI</a>. 
I was hoping to breastfeed this baby for a year, but we would like to start trying for a second baby when she's about 6 months. I'm wondering if I'll have to stop breastfeeding if we go through treatments again? I don't want to have to, and I read mixed things online. Just wondering if anyone here has been through this, what did you do?