@Shuneez ok now Shuneez. Listen to me, very carefully. I won't be light here now.
If you can't be dedicated to science with a torn heart-don't do medicine. If you want to do law in top universities don't choose law, which I already see you have realised. I didn't get accepted in the top 3 universities albeit having biology on my side. The options you've now changed to are much better. So two sciences and two politics, much much better.
It's not your fault if chemistry is full. Never lose that final hope, you are now meeting the tough end of life where not everybody will succeed. But I know you will. You have dedicated your whole life and career to your parents and our God, so there must be something coming. If your final wish is those two sciences and two politics, and your desired subject is not available in the college you wanted, then something will definitely happen. It has to, otherwise how else will you fulfil your dream?