Augmentin for Pregnant woth UTI

I'm 23 weeks pregnant for my first unborn child my doctor prescribe me this antibiotics to be taken for 7 days only for 12 hours. It's really a hard time for me to took it and hesitant because i was so worried if this is safe for my baby. But some of the doctors telling this is the safest antibiotics for pregnant. 
Specially UTI is very common to pregnant and it should be treated right a way and it's a very important to give an attention. 
Hope you give me feedback about this drug if it will not harm by baby 
Thanks to all!!