How to answer nosey friends?


Little background, I’ve been trying for three years to get pregnant with our first baby. I’ve been doing fertility treatments and my best friend knows and asks about them a lot. I know she’s just being a friend and wants to help. I’m in my tww now and have my beta test on the 19th. She texted me this earlier. I really just want my husband and I to be the only ones to know for the first few days bc we’ve been through so much together during this journey. I don’t want to lie to her but I also don’t want her to know the same day I know. She told me the day she got a positive hpt and I think she’s expecting the same. How would you respond?