Well normally I have dischrge 2 weeks before my period up to the day I come on this month I've had it a few days ago but this morning I got a green discharge only a little but I'm worried because never had it before and I know its not an std because I'm the only woman my partner as slept with and the last time I slept with someone was August alst year but had a smear test in feb came back normal so if anyone knows what it could mean the green discharge I would be very gratfull if they can let me know thanks

You're going to have to go to the doctor to get an accurate diagnosis, there are many things this could be, but a green discharge isn't normal.

Yellowish or greenish discharge indicates an infection.

Don't let this go. Get to your doctor asap.