Advice Needed Urgently

I would like to ask members of this site for any advice concerning a situation which has arisen in my life which has gotton so out of control that I am frequently physically sick.

I work as a junior manager at a small housebuilding firm. One of my jobs is to look after the keys to the padlocks which are used to secure the sites at night and over weekends. You can imagine that I make full use of this to sneak in on warm evenings following heavy rain to enjoy the excavations for foundations and main drainage. Of course the company does have CCTV, but I always wear a hoodie and I didn’t think they would suspect me. Still, the CEO is determined to get rid of what he describes as “those pesky little perverts!” Unfortunately, I became a little careless, and left a pair of muddy combats hanging from the letter box of a four-bed detached. I heard at a management meeting that the security contractors took them away and are planning to let them dry out and then try to discover their owner. Trouble is, I know I left a letter from my landlord in the back pocket.

I have decided to do nothing, hoping that the letter may be too water logged to be legible, or that they may not find it. But I am having increasing trouble controlling my bowels every time the phone rings!

Please help I am desparate!