First off, welcome to YT!
How old is your puppy and how long have you had him. The adjustment period of getting used to a new home can be really stressful to the puppy. In your potty training, you said you had scolded when he peed in the house. How hard did you scold? If you have a skittish puppy sometimes even the slightest scolding can really effect them (my sister's dog is so skittish you can't even say "NO" loudly without her running for cover). Positive reinforcement is the best way to cope with potty training. When you get a chance, please post some pics so we all can see your cutie. You will love it here and learn so many great things!