When did you call your OB?

I have a pretty positive first response test. My cycles have been anywhere from 26-31 days so I’m not even sure when it’s supposed to start. I have a history of chemical pregnancy 4 years ago and conceived and birthed my now 18 month old in 2023 via <a href="https://glowing.com/glow-fertility-program">IVF</a>. When did you call your OB? Did you request a blood test?