Sore subject for me, but I need help.

At what point does weight influence fertility? I'm almost 200 pounds, and 5'7". I wear 11/12 in some pants and 13/14 in some. 16 in dress barn pants, but those seem to run differently.... 
I have been TTC for 5 months, and nothing yet.  Is it because of weight or just bad timing? Anyone the same size who can relate? Here is a recent photo of me: