Viral fevers are often followed by fatigue
(weakness / asthenia).
Also loss of taste is explainable / but drowsiness
is not - you need to see your doctor and have some basic tests.
Giddiness is a vague term - if you have sense of rotation or unsteadiness, you may have ear involvement
I suggest you see your GP - just to be sure; you may need some tests / drowsiness needs to be investigated