I have just launched my new site 4 days back. Yesterday 6 pages indexed by google , when i check now with site:myurl.com it shows only 3. Any problem or its normal?
I am not quite sure what might have happened but I would not be suprised if Google Bots crawled your site again and removed some pages.
I'd say its normal. Your site is fairly new and quantum computing is not yet in the question so there's always a time lagg. Google will take some time to show up those pages in the SERPs, worry not
Also, you should get google webmasters tool to help you determine pages that have been actually indexed by Google.