Hi Prakhar ..Many issues have added in your life.. Solve them one by one . We all get influenced . With time and with more exposure .. u will be able to take your own stand. Competitive exams create lots of pressure . Now things can not be reversed . BCA is a thing of past for you now. What you can do is.. focus on your current goal . Now Bachelor degree has no value alone..no matter from where you do it . So BCA +MCA = 6 years . You think yourself ..if you clear your engineering competition.. you will be able to get computer science from a premium institute . also will be able to save your two years as well.

Now for your emotional well being.. you start to give final touch to your preparation . Start talking with other students who are also apprearing for competition Talk with your faculty. It will give you new challenge and motivation . . Do some exercises etc. Hope this will help you to a certain extent . I am also preparing for competitive exams. All the best and wish me also the same