Welcome to HCm,
IT seems that you are having Tricomonnus Vaginalis, a fungal infection
As you are 41 years, there might be senile vaginitis
as at this age hormonal
level decreases causing this problem.
Apply anti fungal cream locally and take oral anti fungal tablet.
Keep local part clean, dry and healthy.
If there is no improvement then consult Gynaec and vaginal swab examination.
Ok and bye.