Hello Tanvi,
U cleared u r 1st grp of IPCC in Nov 2012 n joined articleship in Apri 13 so now on that basis u can appear Final Exam in Nov 2015 subject to completion of all formalities of ICAI i.e GMCS I & II also grp II of IPCC Which u have cleared as mentioned above.
Now in respect of planning to appear For CA final Exam. One most important thing is u should give time to Preparation for 5-6 months then only u should have confidence for appearing in Nov 15 whether ist or IInd or Both depend on preparation.
So if u feel u can prepare at least 1 group then apper in Nov 15.
otherwise complete articleship first and also do classes for final and apper in May 16. which would be better so there will be no confusion at all .
Also In Nov 15 exam there will be Diwali so better u enjoy the festival and complete articleship. Unnecessary tension of exam will give u trouble and confusion.
So be relax and keep doing preparation for finals and think over the above mentioned suggestion.
Thanks & Regards.