I have been having brown discharge and breakthrough bleeding. Today when I was having sex I had very watery discharge and it was a pink like color and there was a lot I am worried since my breakthrough bleeding is usually thick discharge consistency. Is this normal? I started my break a day ago and I am on a combined pill and I am planning on starting a mini pill tomorrow.

Brown is the colour it takes when it has had time to oxidise. Pink is just light bleeding. Nothing you stated sounds worrying.