Can't get back on track! Why?????

I have been trying to figure out why I can't get back on track. I had 18 weeks of steadily raising my mileage with not to many problems. Things started changing when I started increasing my long runs above 20 miles once a week. When I was running 30 miles a week I was ok. With long runs over 20 and increasing my mileage to close to 50 weekly I blew up. Allergies started acting out, I got a cold which would not go away, lack of sleep became a problem, my blood pressure and pulse went higher. Being sick became a mental problem as well. I couldn't run so I became depressed and started laying on the couch, watching TV and eating everything in sight. I even stopped taking my blood pressure, pulse and weighing myself every morning. I finally felt good enough to run the 25k at Goblin Valley and did well. I had major muscle soreness after the run, which lasted a few days. When the muscle soreness started going away I noticed that my IT Band was hurting bad. Along with that my knee hurts. Now I am in a little better shape I need only run a long run every two to three weeks. To give my body a chance to heal up. You can't be consistent when you are sick. Running weekly back to back long runs and increasing your mileage by too much weakins you so you are more prone to catching everything that come along. Need to run smart to stay healthy. November's a new month and a new beginning. Just Run.