Take a break, result result mat karo
I say this with the sincerest intention, you won't find a long break like ever in your life again.
This gap between UG and PG is the only months-long break you will have, after this, for those going into academia, will have to constantly focus on UGC NET, the moment your Masters start.
I understand the anxiety but this is the perfect and probably only time to get a hobby you always keep aside. Go to that holiday you always wanted. Go and read those books you haven't read yet.
Learn swimming, guitar, drawing, etc.
Cause I'll be very honest, do your homework now, check the colleges you want to apply to and see their dates.
And then keep your phone down and go enjoy the world. After this all the responsibilities will be even more serious, you will be more alone.
You may not see many of your friends, family, pets, use this time productively cause it won't come back anymore.
Take this as someone from 1st year Masters, who regrets stressing everyday.