I had 2 failed ivf. now trying for third what precautions should i tak. pls someone help me?

Unfortunately I don't think there's much you can do but just take it easy. The embryo will either take or it won't. Good luck and keep trying. I have a friend who tried 7 times, the 7th being her least frozen embryo and she's now about 18 weeks. She has unexplained infertility. But her little miracle is nearly half way there. Baby dust to you.