I got exactly the same feeling mate. Dont worry. Just give your room a really good clean, open the windows for fresh air, open the curtains and flood it with light. Wash the sheets. Anything thats in there that you might have used for pmo like lube or anything else, throw it in the bin. Wipe your computer so it looks clean and professional. Then remember your bedroom is just for sleeping. Dont go in there during the day. Use your computer out in the open if you can. Like in the lounge room. You should start to associate your room with sleeping and being relaxed, not with being dirty.