Afraid to get my hopes up!

Alexis
Back in June I misscarried for the first time, then last month I had a chemical pregnancy, my fiancé and I have been ttc for 10 months now and after my chemical we tried again right away. Well I haven't started my period yet and I'm 4 days late, I don't really "feel" pregnant other than my lower belly being a lot more firm, I want to be pregnant so bad but I'm afraid to get my hopes up just to be let down again .. Any thoughts ??