Doppler?

Ab

Should I buy a Doppler? Paranoid at 9 weeks about losing it and I don’t have my first appointment until Friday. I like my Ob but every time I call the office with questions the nurses are rude and unhelpful and tell me if I’m in severe pain to go to the ER. Not having severe pain, just nervous I’m gonna lose my baby! Ugh. Any recommendations for cheapish dopplers around or under $50?