Bfp! Due in October.. I think!

Shannon
Got our bfp yesterday! Baby #5! Unsure exactly as to when I will be due though! Doctors put me as 8 weeks 6 days as I didn't have a period in January but I didn't get a positive result until yesterday... so won't know until my scan at 12 weeks. I'm going with October being the due date based on the fact I didn't get a bfp til yesterday. Has anyone else had that before??