Scared that I be mad. Any worse in time?

Going through really bad times, tried to startup a company, not so successful in that. Relationship troubles, parents pressure, work loads etc. Maybe these are my problems. From few days I do things that a normal ME will never do. I figure it out after sometime and regret what was I even thinking. Sometimes it feels so foolish. I also forget things quickly, I stay awake whole night, I was the most confident person and now I feel like a looser. Tried talking to people about this, but friends will take it in a funny way. Asked my gf, she scolded me instead and called it as a drama, can't tell my parents, they might freak out. I am helpless. I googled my problems and did my research, few articles said it was symptoms for intellectual disability. I am confused, freaked out, scared that I might end up like a mad people we see on TV's. Can anyone help me? Is this normal? What should I do about this? Will it get any worse in time?