I lost a lil ray of Sunshine yesterday

I can't help but feel soo empty , I keep thinking back to last week when I found out I was pregnant and everything was perfect for a split second. I could help but smile and feel wonderful that all changed yesterday morning ,I started spoting and a couple hrs after that I began to have a regular flow .I was completely devastated I knew I had to go to the er ,after all the test blood work and sonograms it felt like forever till the dr came to see me finally I could just read his face it was not good news my hcg levels were back to normal and there was no trace of pregnancy in my ultrasound I couldn't help but break down I had all kinds of emotions come over me , how could this happen why did this happen will I ever have that lil bit of sunshine back ? I'm still trying to figure this out I know they said it was nothing he nor I did but how can you not think those things and where do I go from here ??