AF week late, multiple BFNs, when to see a doctor

Laura • High school teacher, rescue dog mom, army wife
I'm driving myself nuts. My husband and I weren't trying but we're very active and as of today my period is a week late. I'm usually regular like clockwork. I've tested daily since the day I missed my period and gotten multiple negatives. Took a FRER this morning and got another negative (I'll post a picture). How long would you wait until going to see a doctor? Has anyone been through this before? What was your result?