Ok so I started sneezing and having a runny nose on March 25 at night it lasted until March 28?

I have symptoms like you. Sneezing and runny nose. I also get congested nose, headaches, nausea, cough and dizziness. It has been almost two years and I still do not have a diagnois. It is possible you have allergies to maybe pollen. Some trees or plants or pets. Or maybe food or drinks you consumed. Try to remember what you did and think what could have caused these.