Anxious nervous and overwhelmed

I have been trying to conceive for 3 years and have suffered 2 miscarriages. I try to be optimistic and positive that I will eventually conceive. I'm getting so frustrated and overwhelmed. I tried preseed last month. Just feel like it didn't work, I had minor symptoms on the 2nd through the 4th DPO then it was gone and so are the symptoms. Just trying to be positive but don't want to be disappointed again. AF is due tomorrow, I guess we'll find out soon.