The same thing happened to me. I went to a private pathology lab to get the same tests done because thats the lab my GP used (but I was already pregnant) and I ended up paying $184 and got about $80 back.

I wasn't warned about it before hand and after it was already done there wasn't a lot I could do about it! It totally sucks!

Maybe next time ask your doc to send you to a bulk billing lab.

Good luck, I hope your TTC journey is a short one!