Help!! Called dr... now turning to you ladies 😘

I start my FET process this cycle. Period due tomorrow. It started at noon today. Heavy enough. Cramps and all. I called my clinic and spoke to a nurse. I’m suppose to start estrogen the morning of cycle day 1. We’ll cycle started mid day and wasn’t going to be home until 6pm. So I asked what to do. She said it was up to me. I could start tonight, taking estrogen when I get home and 2nd dose before bed or I could start my cycle day 1 tomorrow - it really doesn’t matter. I want to do everything perfect and putting the decision on me doesn’t reassure me lol. So, here is my question... what would you do? Delay the 1 day? I should add, flow has since slowed a bit, which is making me lean towards tomorrow.... any input or experience much appreciated. Thanks! PS. This is my first FET.