Till now I thought oct 21st born fall in Libra

It can change any years, it all depends on what 'time' you were born, Lat & Long. You need to get a free chart from www.astro.com and get it confirmed or check in a book 'ephemeris' or online ephemeris like

http://www.khaldea.com/ephemcenter.shtml

You need to understand there is far far more to astrology than just ‘sun signs’ firstly there are 10planets in the sky and 12houses and any one of these 10planets can be in any one of these 12 houses – so there’s 144 possible combinations there –

What is vitally important is your ‘time of birth’ and nearest town and then go to free website like astro.com to calculate your natal chart, you may have to reduce the image in Extended chart selection to 63% save to your hard drive, then upload here.

You need to post your chart in Western reading forum, you can get this free very easily from www.astro.com. You may have to reduce the image to 63% in Extended chart selection