Have you been OPKing? I have found it gives you a clear 'window of opportunity' and at least you can pin point the days in your cycle your more likely to fall pregnant. Remembering there are only a couple of days within a womans cycle in which she is fertile, therefore fall pregnant - for some woman its shorter.

Maybe start charting your cycle, and after a few months, if nothing has happened (i.e ) then take your chart and yourself of to your Dr, get everything checked out........

Hoping you wont have to do the above, and the cramping is your sign of a