TTC but no luck...

Paige • Married to the love of my life!❤️ I have a beautiful 6 year old daughter, and a handsome 2 year old son! Currently pregnant with baby #3!🥰
My Fiancé and I have been trying to conceive for about a year now with no luck. It seems that our friends and other people around us are getting pregnant and they aren't even trying. It gets depressing at times. We don't know what vitamins to take and if there are a special kind for him or both of us. Any advice. It will be greatly appreciated!