If you could please tell us what allergies you are suffering from may be we can help co-relate your symptoms. Generally
itchy eyes along with congestion are allergic. Only
itchy eyes can be a part of tearless eyes or dry eyes or eye strain and sometimes also refractive errors of the eye. Only congestion can be a part of bronchitis, flu, asthma etc.
Hope this helps. Please let me know if there is any thing else and do keep me posted. Take care!