question: hi I'M 25, I HAVE A 3 YEAR OLD SON, WE HAVE BEEN TRYING FOR ANOTHER BABY FOR 1YEAR & A HALF GOT PREGNANT 13MONTHS AGO BUT LOST THE BABY AT 11 WEEKS, HAVE BEEN TRYING SINCE BUT NOTHINGS HAPPENING, HAVE NOW STARTED USING CHINESE HERB MEDICINE NUAN GONG YUN ZI WAN, IS IT EFFECTIVE & SAFE? THANKS