Not doomed. Trust me, I suck at math, and I passed Chem with an A. I had a great teacher that cut out the crap, showed us dimensional analysis (best way to solve problems ever!) and I maintained an A without struggle. You just have to know where to put what. It all follows a pattern, and once the pattern is good to go in your head, it becomes second nature and you will whiz through problems. Chem problems try to slip you up with extraneous info in the word problems, but you'll become so good at it that you'll learn to recognize what's excess and what's needed to solve the problem, put the numbers in their spots, bam, bam, calculator, done.
Once you get it, it can actually be kind of fun. I have Pharm right now, and those skills are helping me a lot when it comes to these problems! Fall in love with chemistry -- you will thank it later.