After miscarriage. What happened to me.

After years of struggling I became naturally pregnant on Aug 2020 all are going good but 12 th week nt scan shows baby heart stop beating then my doctor told us it was silent miscarriage. So that I did d& c on November 2020. After d & c my period length 28 to 30. But this year april 7 to may month period didn't come.i checked hpt on 32nd day of cycle because of pregnancy symptoms it shows faint positive then check it again on 38th day it also fainted. After that 40th day no symptoms test also negative.i again went to my doctor she took scan there was no gs then she prescribed progesterone on 45 th day for 5 days . I got period on 51th day may 28 2021. Today my cycle day 29 . 1 day missed my period and I have breast pain some times. What happened to me.