Hello Vaidehi !!

You have to go to -http://www.medadmgujarat.org/ug/home.aspx

Log in there using your already registered ID and password.

If you went and took admission in the first round seat and selected float option then you are eligible for second round couselling .

Since, you said that you got admission then after getting the new seat you will lose the earlier seat , and if you do not get a seat now then you can go back to previous seat.

Now for reshuffling , while choice filling you can do that .

All the best 

Hope this helps.