6 months TTC no luck...

My husband and I have been trying to conceive for 6 months now and have had no luck. I am starting to become worried (even though I know it may be too soon). Every one of my married girlfriends is pregnant and I feel as though I have no one to talk to. My husband is supportive and tells me that everything will be fine but it's hard not to become discouraged as everyone keeps saying your next. I don't know if I should speak to my doctor and voice my concern or if I should just continue and let nature take its course.