Since i started exploring philosophy and come to nihilism i am like a psychopath, is this normal?

Not unless you act upon the negativity of your current observations/interpretations.Many people who study or teach philosophy could ask what you are asking. As you`ve trained to come from several perspectives, and a lot is going on beneath the veneer of `civilization` the gift can be a burden. so turn it to a more dynamic and vital area where your multi-perspective`s positively absorbed into something non-isolating and with other dispensibles e.g. humans I really don`t know what`s for you, but I became a psychotherapist where my perceptiveness was an et. Just don`t isolate yourself please.And if necessary, get therapy as a raft to get you to a better shore before you hit clinical deprion.