Brake syestem

I have a 2003 Dodge Grand Caravan which has 53,000 miles and has a 6 cyclinder engine. I did something dumb and now I am trying to fix my mistake - I needed to put sterring fluid into my van, but when I did it I did it in the dark and acctidentaly put in the brake system, so the brake petal was starting to go to floor, so I knew I needed to flush them and put more brake fluid in. So I did that but my brake petal is still not tight, someone metioned that I might have damged the pump! What to you suggest I do or try now.