Hello @jimblack, I have used flonase but not oxymetazoline. Watering of the eyes is mentioned as one of the common side effects.

--- Tetracaine And Oxymetazoline (Nasal Route) Side Effects: https://www.mayoclinic.org/drugs-supplements/tetracaine-and-oxymetazoline-nasal-route/side-effects/drg-20312343

I've also struggled with nasal congestion. I also have a deviated septum that I've put up with all my life. I was considering a septoplasty but wanted a non surgical solution due to risk factors involved. I met with my Mayo ENT and he prescribed a Mayo Clinic proprietary nasal spray with 3 ingredients — Mometasone to reduce inflammation, Ipratropium to reduce nasal drainage and Diphenhydramine which is an antihistamine to help reduce nasal drainage. The product description on my prescription is MOMET 0.033% – IPRA 0.02% – DIPH 0.02%. I do a nasal rinse mornings and evenings followed by 2 sprays in each nostril. I used the spray and nasal rinse for 3 months and it has did an amazing job helping my breathing through my right nostril which was mostly always plugged. After that I stopped using the nasal spray but continued the morning and evening nasal rinse which helped quite a bit with the congestion. About six months ago I switched from using the nasal rinse to using a SinuSonic breathing device (https://sinusonic.com/) which is easier to use than doing the twice daily nasal rinse and the results have been good for me.

Have you seen an ENT doctor?