Super new at all if this

Alexis
So my husband and I have been TTC for the past 8 months and it's super hard because my period is not regular. I'll skip like 3 months at a time. My doctor put me on medformin to see if this regulates me. AF is due on 6/9. Is it too early for me to take a pregnancy test? (Sorry if I'm not using the correct terminology)