Emotional, tired, etc

This is my first entry in the message board...I feel like writing will help me get these thoughts out of my head. Been TTC for a year. Started testing...bloodwork, ultrasound, HSG, my husband just went. I'm tired, drained, exhausted, sad, the list goes on. I know there are many of you who have been TTC for longer and I can't imagine how frustrating that must be. It only took 3 minths with baby #1 who is now almost 4. I am having a hard time keeping it together every day but it has really hit me hard this month because it's officially the one year mark. Next step is meeting with an RE. Why is this so hard???!!!