BFP after 2 miscarriages 🌈

Sara • MC 10/2015 at 4 wks & MMC 10/2016 at 8 wks + 2 days. Currently pregnant with my rainbow, due 11/2. 🌈
Had a really weird cycle this last month. Took OPKs for 2 weeks and never got a positive surge, so didn't think I'd ovulated (been down that road before as well), but to my surprise I got a BFP this morning after AF was a week or so late. I've had 2 miscarriages- one in Oct 2015 and another in Oct 2016, so I'm excited about this new pregnancy, but also terrified. On progesterone suppositories. Those who've been through a similar experience- how many weeks were you for your first OB appointment?