I stopped when I was 19dpo, and I also took a hpt every day starting on 10dpo.. I had an early miscarriage the first time I got a bfp, so I was definitely scared.. I did betas on 10dpo, 12dpo, and 19dpo... When they told me at 19dpo that was my betas were over 3,000, I stopped putting myself through hell. Lol. Congrats!!!