I need your advice & suggestions ladies pls

E.
my cousin mentioned to me that the best days to have sex in order to have the best chance of pregnancy is on the last 2 days of ovulation...
​I attached my calendar .. my question is .. should I be having sex more often?
​I get the ugliest feeling that I am no longer able to have children :(
​I have had a cyst removed from my ovary the size of a golf ball almost 2 yes ago and since then my SO haven't used protection & haven't gotten pregnant. 
​this is my second month actually TTC
​any suggestions or advice?
​also, do you think I have any chance of getting pregnant this cycle??
​