Chemical Pregnancy

Katie
I was having some weird pains on Friday and am 5 weeks. My doctor told me to come in and when I was in they did an ultra sound. They didn't see anything there. The pregnancy test still came up positive but they think it's a chemical pregnancy. They did blood work and are doing more on Sunday so they can compare to see if my Levels are going up or down. The doctor didn't seem positive though. My husband and I are grieving as if we have 100% lost the baby.
I know this is common and it's nothing I did wrong. But I feel so guilty. My SO was so excited. The due date was his birthday! 
I feel heartbroken and scared this will just happen every time.
I almost don't want to try again because I feel like I will just let him and me down again. I know it's not my fault but I feel like it is.