Will there be symptoms even before a positive pregnancy

Missed period for more than 3 days, then extended to 7 days and then 10 days. Felt really tired very easily between 5th and 10th days of missing my period. Fell into deep sleep once I laid on bed. 7th day of missed period I have brown discharge - very little and thought my period is coming after being delayed for a week but it still didn’t come 5 days after the discharge. Then my breasts felt sore and appetite became poor. Felt bloated. Stools became harder. Couldn’t eat much even though i have hunger pangs.