If the sore throat is not getting any better then we usually swab after day 5, (unless there is obvious pus). It sounds like your system has been put under a lot of stress so I would not be surprised that you are not feeling better. If you have been exposed to a virus or bacteria that is not a local strain, then it does take longer for your system to produce the right antibodies and start to show improvement.
Swollen glands are non specific for bacterial, fungal or viral infection although if they are tender then that can indicate bacterial in some patients. The only way to be certain is to have some swabs run.
Aside from antibiotics for a bacterial sore throat, the treatment remains the same for relief of symptoms whatever the cause. So if you are feeling very bad then see your doctor.
You are feeling sick because your immune system is being attacked by a pathogen. If you do not normally get a great deal of exposure to a range of organisms then your body does not have the information it needs to speed up healing. The fact that your glands are swollen show that your lymphocytes are gearing up production and are flooding your system. A systemic feeling of malaise and unwellness is usually associated with viral due to the specific factors that are released. Bacterial infection usually has a more local symptom although it is possible to get a secondary bacterial system after a viral infection.
It has only been four days, so I would allow your body time to deal with this. Your doctor can run swabs and check your blood count if you want more information about what is causing this, however most of the time people try to control their symptoms until the virus is taken care of. Unless there is obvious sign of a bacterial (purulent) sore throat or one that .lasts longer than 5 days in which case antibiotics may be necessary. Ring your doctor on Monday for an appointment, and in the meantime drink plenty of fluids and rest over the weekend.