Puzzled by "Karma Theory"

Hey all,

                        Today I woke up early in the morning as I have decided yesterday. I got ready and reached my workplace. It was 8.30 in the morning. But something different happened today. I couldn't find one of my colleagues cum friend there. It is very unusual because she is very punctual. Everyday when I reach office she used to greet me with her cheered up smile. I couldn't see it today. It felt something weird. And the wheels of my brain started churning...."Why she hasn't come yet? She never gets late.Then how come today? I clearly remember she didn't tell me about her late arrival yesterday. May be there is some emergency. May be her vehicle got punctured. Should I call her.. No No I should wait for some time. If she won't come till 9 I will call her"

Finally at 9; the chain of my thoughts was broken by her arrival. She was looking very tensed, breathing heavily as if she directly came after participating in a marathon. She came and sit beside me. "OMG mitali....Don't even ask what happened today... " As if I won't ask and you will let me go without telling your "Ramkahani" I thought.....She took a while before continuing further. I guessed she had a long story. (My sense of humor is pretty cool) "Today my alarm didn't ring and I woke up late. I got ready, entered into a lift and that too didn't work. I was already late and mid way my vehicle got punctured. " "Wow correct guess Mitali..Well done !!" I thought. She continued in a single breath "To my surprise there was no mechanic  in near by area. I left my vehicle and was waiting there for an auto..It took 20 minutes to get an auto .....and finally I reached" She stopped (Thank God) I mentally Thanked God. But spoken too soon...........She again started "Yaar....why all this happen to me.I have done nothing wrong to anyone then why always me.I am so unlucky...."She started cursing her fate. This question grabbed my attention. I even sometimes ask the same. After all this laab laab she went to her desk and started doing her work. (We are not getting paid for gossiping ..That's why she left early) ; leaving me behind, thinking what she just said.
                   Really how could this happen?Without hurting anyone how we are forced to suffer so much in life?Is it really because of our past deeds? I have heard people saying "He certainly had done something wrong in his past life. That's why God is doing this to him"
I guess upto some extent they are right. That's why some people are so happy and some find their lives unbearable. Some are sleeping on the roads and some have mentions. If it is not then why this happens? What are the measures for distributing happiness and comfort among people. If so why is it said
"All have their own part of grief and they have to bare that."

                      I am confused.....Juggling between my brain and mind.

              

       What you think ???