Can I Have Intercourse At Night If I Inserted Susten In The Morning?

Hello. My gyenac has prescribed me susten 100mg and 200mg. I would like to know can I have intercourse at night if I have inserted susten 100mg in the morning and she has told me to stop the medicines on 1st. My next period is expected on 5th. What are the chances of getting the periods on the expected date