In my head??

Kelli
Only 4 DPO, but feel really weird...this is my first month ttc. I have a 7 yr old but was not trying at the time so i wasnt looking for signs or symptoms...i just wonder if since i am actively trying maybe its in my head how i feel. Im bloated, gassy, nauseous, back ache, cramps, metallic taste in mouth....is it in my head?? Am i making myself think these things are happening?