I am 26 years old and 13 week pregnant, my doctor done USG himself and report was OK, he prescribed acucal tab and anofer tab, I have seen one of my friend she used to take natural michronised progesterone and l arginine sachet in her pregnancy, my doctor not prescribed any of these, is it OK? And 1 month before my USG shown 8 weeks pregnancy but after one month when my doctor done USG he told that it is 13 weeks, but it should be 12 weeks, is it a problem?