2nd Child

been trying for a 2nd child for 6months now, no luck. what should we be doing to increase chances? did not do the deed for 2yrs plus until we wanted to try for 2nd. every time we have to plan when to do it if not we end up not doing at all. its not a very pleasurable experience anymore. i was breastfeeding for 2 yrs plus. no feel for any intimacy. it is really frustrating. sometimes i end up saying to forget it, and just cry to sleep. every time my period comes, i just feel an overwhelming sense of sadness. will i ever have a 2nd child ?