Ah!!
Re-trace my steps!
1.Went into caf to get lunch
2. Got tropicana twister still had my retainer in
3.Got M&M's and Skittles.. Still had it in
4. Sat down on bench.. still had my retainer in
5. opened my bottle of TT still had retainer in
6. Opened M&M's still had it in
7.Ate one M&M and took my retainer out and placed it on my lap
8. Threw out rapper of M&M's and still had it on my lap
9. Got up and put retainer in my hand
10. Walked around and still had it in my hands (maybe I think)
11. Bell rang
12 Got my jacket and may have placed it in there
13. Left my jacket in english room
14. Just relized now where it probably is
15. NEED TO FIND JACKET!!