I heard that few women bleed during their implantation. Implantation usually occur on the date of next period. But implantation blood comes for only few days. My question is that, I usually have unbearable cramp during my period. So the first thing I do after spotting is to take meftal spas before the pain gets severe. People says meftal spas are not good for fetus. I am afraid what if I mistake my implantation bleeding for period and took meftal spas.