doubt on my own body

Heyy lovely ladies.. Hii to all..

as you'll know Ni suffered a miscarriage in June.. and know again m TTC right know.. I am experiencing certain changes in my body.. ok so, lemme start from the beginning.. had my last period on 20th July duration was for five days. from June to July the cycle length was exactly 40 days.. and today is 20th day of my cycle.. and the changes which is occurring in my body are.. cramps, pelvic pain in right side of abdomen,, dizziness, stiff nipples.. sometimes stomachache... so what you ppl think of it.. m I experiencing the early signs of pregnancy or it's just a trick which is played by my mind????