What's the next step?

Lauren • Married August 2014, first born July, 2016, #2 coming this New Year’s!
TTC for 7months now and no luck at all. I'm getting paranoid that something is not right and am not sure what to do next. I've had the hormone blood tests and thyroid test and all came back normal. I also had an ultrasound that didn't show anything out of the ordinary. Should DH get tested? Do I reach out to fertility doc or do I have to go through my obgyn? I'd love to hear what you ladies have done to help you conceive. Thanks!