DP and I have been TTC no 2 now for 15 months.

it took us 18months to conceive last time, then i mc that baby, then 6 months after that to conceive DS.

DP is very "thingy" about it all, he won't "try" in the sense of timing, cycles etc. he has the outlook of "if its meant to happen, it will happen" which is all well and good and to be honest I have been trying not to put too much energy into TTC (thinking about it, obsessing about it etc) as last time I ended up an emotional mess and I don't want to go back there.

so my question is, at what point is it to long to be trying? at what point do we/should we seek help? (I say we, but probably mean me!)
What do I do? how do I go about it?

Do I just go to the GP and say we are having trouble conceiving? what will they do? say? what happens next?

Sorry for all the questions I'm just getting a bit frustrated and worried and do't know what to do....

thanks