Need advice for a newbie


I need some advice, I'm new at this so bare with me, I just recently turned 33 and I've got 2 children already via c-sectio. My oldest will be 12 in April. I've had 2 miscarriages the most current was November 2015. I've tried to follow my period and ovulation as best as I could, and still no luck. My fiance takes quiet a bit of medicine for his health issues, my question is this can the medicine be affecting his sperm count? He has a son also who will be 12 next year from a previous relationship. Or should we seek medical help because of our age. He's 35. Any advice is welcome! :)

Also, I am new to this. What do all the abbreviations mean?