my HCG !!

Nor • I am 27 almost 28 , one year happily married , TTC for 4 months now *wish me luck*
My period is late , I had some spotting in 19th march and it was should my period star but just a little spotting and nothing except after 3 days I had brown discharge and I am sure it's not blood ! I still have it and I had test yesterday and my hcg is 0.100 , I now i am not pregnant but what should that means ? I am scared 😭