New here!!!

New to the group, my name is Marissa! My partner and I have been trying religiously to conceive for the past 1.5 years (since Oct. 2013). We got pregnant in 2014 and lost the baby at 16 weeks in April 2014! More than ever I want another addition to our family, we have a 3 year old son! We've had no luck and it's been really hard on me. Any tips to help conceive again?