I have been using restasis since April 2008. It is now early Aug...

I have been using restasis since April 2008. It is now early August. During this time I have developed four separate upper respiratory infections. Each time I got sick, it got worse. Now, the 4th time, I am extremely sick. I developed bronchitis AND pleurisy. I was just about over that (still taking antibiotics for the bronchitis) and I woke up this morning with a severe cold, sore throat, earache, etc. I'm wondering if there is a correlation between the use of restatis and the re-occurring upper respiratory infections. They've only started since I started using Restasis. Coincidencce??