Is there anyway i can find out?

There is no way to find out if your husband uses Skype, unless you happen to know his account name. And without his computer, you cannot even use a key-logger to track what he is up to. I wouldn't ask any questions of him, since you will get no honest answers. Just hang tight, observe and listen. If your gut tells you he is cheating, then he probably is, but you don't want to jump to conclusions and be wrong. You could just be suspicious because of his past cheating. I can relate. You may want to go to the website: www.survivinginfidelity.com. It is full of great advice for people who suspect adultery.