Fave pregnancy tests? Spots to buy in bulk?

I’m undergoing fertility treatment (yay!) and am about to start another cycle. Last month I had a false positive and I’m wondering - what tests have you all used that are actually accurate? Our poor hearts can’t take a false positive again 💔 I also spent a small fortune testing last month before and especially after that horrible test, so would love any recs on where to buy these in bulk. Tysm!