16dpo today (CD 35), ovulation confirmed with opk and bbt so pretty confident of the dates. Normal luteal phase of 13 days so AF definitely overdue. Started pink/brown spotting this morning but took a test just to see. Very faint BFP but I know it's just not dark enough for the dates 
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I had a chemical in May at 5 weeks, pretty sure it's happening again. Anyone have a positive story of success after several chemicals? I have children already but am 39 now and wondering if it's an age thing? Been trying 7 months and they're just not sticking.