I'm 14 weeks now and bought a Doppler a few weeks ago to check on baby as I'm a bit panicky after a previous missed miscarriage where I carried the baby for 3 weeks after it had died without knowing. I used it every day for the first few days, about 20-30 seconds at a time, and now maybe every 3-4 days, but I'm reading online about how this is peak brain development and am worried that maybe I've caused brain damage or autism? Anyone with normal healthy babies that they Dopplered in utero?? Thanks!