Mistaking Period Symptoms for Pregnancy Symptoms

Kelley
I had my first miscarriage back in January, had my first "normal" period in February and until today when I took a test and it came back negative, thought I was pregnant again for sure.
I had extreme nausea, bloating and cramping, and I swore every part of me thought I was pregnant again. Even though I had a negative test AND my period started today, I still feel pregnant.
How am I mistaking these period Symptoms for pregnancy? It feels like my body and mind are playing tricks on me. I know what pregnancy feels like because I have a healthy little boy, but man why was I so sure I was pregnant and it's just my period. 
Maybe it's been too long and I can't tell the difference anymore. I don't know. Anyone else feel like this after a miscarriage? 
I don't know what normal feels like anymore when it comes to my period and body but this is weird to me.