Allergies or what?

Please help!  In February I developed Blepharitis so y eye doctor prescribed Tobradex, I used the medicine and still were having problems so I went back and he said well maybe it is allergies.  He than gave me Allergy eye drops.  I used them and were still having problems (syptoms - red eyes, itching burning and some discharge).  Went I went back for a 3rd time and he did a more extensive exam he said I was developing dry eye and should use Thera Tears and take 1000 mg Flax oil seed capsules every day.  I have been doing so.  In the meantime I develope a sinus infection - yellow drainage from both sides.  Doctor puts me on

antiobotic (1600 mg for 10 days) and prescribes Nasonex.  Well that was on 3/26/08.  I still have drainage and now when I blow my nose there is some blood but not all the time.  My question is could the eye infection and sinus infection be related somehow?  Could I have had a sinus infeciton all this time that was causing problems with my eyes?  Thank you for your comments.