Hello and welcome to HCM
Pain in the lower part of abdomen while stepping on foot indicates a muscular pain
However, you need to visit your GP for this problem.
Presence of discharge with fish like odour could be because of semen as the latter has a fish like odour.
However, if you feel that the discharge is from your genital tract then you need to get some investigations done.
You should get culture of the vaginal discharge
and Pap smear
After getting the tests, post your report on HCM for further help.
Thanks ans take care
Dr Shailja P Wahal