When to get labs drawn 🙂

Ti

Need help due to needing labs cycle day 3* I need help deciding when cycle day 1 is. On the 25th I had brown when I wiped after 7 pm. Only happened twice. I. The 26th I was having brown only when I wipped all day. This morning on tbe 27th I have bright red full blown period. I am not sure which one to count as day 1.