Girls, hello everyone! I visited a mammologist, did the treatment she …

Girls, hello everyone! I visited a mammologist, did the treatment she prescribed, and everything is good now, hoping it will stay that way. I wanted to ask you a question about fetal Doppler? Have you used it? Pros and cons? I'm constantly worried about the baby and rush to ultrasound immediately, already been four times. Now I want to buy a Doppler? Do you think it's a useful thing? I know that soon when I feel the movement, I won't need a Doppler anymore. But still, I want to calm myself down.