Buttoneska, it can't hurt to have a checkup, but I thought I would give you some positive thoughts
My daughter was conceived naturally after trying for over 12 months, I was only 20, well 21, she was conceived on the weekend of my 21st :P But, it took us a long time and I actually credit a little too much alcohol for finally falling pregnant. Oh and also because I was offered a job that I couldn't take if I was pregnant
We started trying for no 2 just before Nat turned one, thought it wouldn't take too long, Eth arrived when Nat was 3 and a half, well over 12 months of trying again. I am pretty sure he was conceived because I was accepted into uni and couldn't handle that because of severe morning sickness.
Once we had Ethan, we decided we wanted a third, figured since the others took over a year of trying, that so would the next one, mmm, there is 16 months between our two youngest boys.
It can take time to finally fall pregnant, lots of time, but sometimes when you finally 'give up' it happens.
Please don't get upset with anything I have said, I don't mean to upset or offend anyone. Sometimes I just don't think before I write things.