I had protected sex with my boyfriend in 28th may.we had a doubt so I had a tab unwanted 72 in 29th. After this we had sex in 7th June and taken an tab-unwanted 72 in 8th.now at 10th June my periods got started but the flow is not good.there are only 1-2 drops of blood is flowing in a day.I am too scared of being pregnant.I don't want to go to consult any doctor. Is this normal?what should I do?please help me!

It can be normal (within the expected variations of any woman).
It can be pregnancy.
It can be a consequence of taking what you call 'unwanted' pill! These pills are not candy. Of course they have an effect on your physiology. Get some regular birth control instead.
Now all you can do is wait for your next period, or do a test in 2 weeks. I would guess that you are not pregnant, but that's just the odds, not fact.