Welcome to HCM.
As you are a known Crohn's disease patient, your persisting ocular problems are due to ocular inflammation( which occurs in about 10% of Crohn's especially the one involving arthritis
Once you are symptomatic(painful red eyes) , get it evaluated each time by your ophthalmologist as it requires topical anti inflammatory eyedrops each time as it can cause temporary vision problems.
Your nose and eyes are connected through a small delicate tube called naso lacrimal duct. So when ever one gets swollen up during inflammation it directly affects the other too. So blowing a nose too rough would have caused the mild mucus to regurgitate. Once you take a symptomatic relief for your nose problem ,eyes should be fine.
So don't worry. Take care :).