Fetal Doppler usage

Hello po mga mii. I had 4 miscarriages po( Blyted ovum, Small Gestational Sac syndrome, Ectopic pregnancy and Incomplete abortion) prior to this pregnancy. I am currently on my 13wks of pregnancy as of today. Tho my labtest results looks normal and nrinig nman na ng OB ko ung heartbeat ni baby, hndi ko pa din maiwasan hnd magworry kung okay lng si baby sa tummy ko lalo at hnd ko pa ramdam ang movements nya. I bought a fetal doppler, ask ko sana if it's okay to use it daily? Or ano po ba ung advisable na usage pra safe po si baby? Thank you po.