Nausea for a week, please help!

hi all,
i have been experiencing nausea for around a week now and have been prescribed omeprazole however, this hasn’t been doing anything to help.
i have also experienced loss of appetite.
any advice? i have thought of pregnancy, however i have just had my period and have been told theres no way for this to be possible.

I had similar feelings and was also given omeprazole. i am now in week 4 and only just having nausea free days. i think they take time! very frustrating