I eat a healthy diet and take magnesium, zinc, K2, D3 each day. I also take Hydroxychloroquine every other day (for IBS).
I developed a slight sore throat and started to sneeze. My nose started to become blocked. I inhaled 0.1% hydrogen peroxide solution using an ultrasonic nebuliser several times during the evening and night. The following morning the symptoms had almost disappeared and by afternoon I was fine.
I make the 0.1% solution by mixing 1 ml of 3% Hydrogen Peroxide (from any pharmacy) with 29 ml of deionised water. It has a faint smell when inhaled but doesn't sting or cause me to cough.
DISCLAIMER: I'm not a doctor; I'm not telling anyone to try this.
You could have just named your cold with a greek letter prefix (you are qualified for this) and then told the world that the sky was falling because of this new [insert your uniquely named cold name here] disease, and get some laughs as Doc Fauchi and the MSM gang hyped up your cold. But no, you had to cure it instead, and spoil all the fun.
Anyways, I'm glad to hear you are feeling better, and thanks for the tip.