Not feeling well at all

I have had the following symptoms for the last week and not sure if its something serious to see to GP about or its just wasting there time.

Been feeling very hot and flushed, very tiered and weak, nauseous when I eat especially in the morning and using the bathroom a lot (2)

I am already on antidepressant pills, the pill and multivitamins and have been for over 6mths

Should I see a GP or is it just some sort of cold like thing.

Thank oyu