is TransV safe???

Nag miscarriage po kc ako last march on my 6th week of pregnancy, s first transV, OK nmn at nakita ung Gsav and Yolksac, 5week 6 day xa that time, pinaulit ang transV for viability after 3 weeks and found out n no heartbeat c baby and dapat NSA 7-8 week n and development nya pero nahinto xa s 6th week... Now, I am on my 6th week again and natatakot n ako magpatransV...