I have swallowed 20 common pins (small) ,I swallowed 10 of these a month ago and nothing happened ,this time still there is no pain but I am too afraid ,I suffer from extreme depression all the time ,Please guide me what to do 
You must speak to your Doctor or someone you can trust, a perforated Bowel is not pleasant in the slightest
I just can't tell anybody ,there are no symptoms either but I don't know the consequences
I wouldn't worry about it they've probably passed straight through,, or they'll just be rusting away in your stomach (or caught up somewhere else), they're not really sharp enough to cause much damage unless you are unlucky, I mean your GI tract is pretty tough and rubbery (you hear of people eating razor blades and glass as part of stage shows)
You must find someone who you can talk to about your problems, this playing russian roulette with bad times isn't much fun
The consequence is unknow but can be a potential complication in the long term such as someone mention bowel perforation but surely your body will gradually goes into stages of imbalance called homeostasis imbalance which sometime your body will recognise these as foreign object eventually rejected it and possibly cause fluid to build around the surrounding area which may cause irritation, remember your stomach has full of acid fluid and these acid can cause the burning but trying to burn the pins is meaning the surrounding area is also burning can lead to complication such as pain, infection and so forth. The Dr will properly not doing anything s now cos your are very normal but Dr will wait for any of those complication to come before they do anything. So please take care of yourself and get some behavioural therapy help, wish you the best of good health.