I have not pooped in 7 days, help me!?

Today is Monday and I have not went number 2 since Monday. Wel, here is the story. I am usually always constipated but this time is bad/ the longest time. On Monday, I gor food posioning and had the runs from McDonald's ice-cream. You know how they are supposed to clean the machine every 3 days but they either do not or do it poorly. Well, I got sick later that Monday and it went away when I woke up. Now I do not crap. I think this is unhealthy. I had a fiber supplement pill yesterday. Oh wow, I just saw on the bottle that you need to take 5 pills of .52 grams of Bulk forming laxative per dose up to 3 times a day. I only took 1. I do not know what to do. Please help. I know my diet is bad and I am a vegetarian so the meat does not clear me up since I do not eat it. I ate this yesterday: hohos ( 3 individual ones so 1 and a half pks), pancakes, a lot of water to the point where i pee every hour, cheese pizza, nachos with melted shredded cheese and BBQ sauce, 2 stalks of celery, 2 long carrots, 1 apple (red/yellow), 2 fun-dips, about 5 freeze pops and that is it.