This is just my opinion based on being married to a computer programmer who attended Berkeley and now works in the high tech field in Silicon Valley.
You need to define what you mean by "interest". Do you already have an interest in computer languages, do you dabble in C+ or Java or other languages for fun? Do you like hacking game code? Do you want to take it to the next level? Or perhaps you like some other aspect of computers - if so - do you find that you already enjoy mastering aspects related to it?
If you can at least muddle through the math AND you already love the programming (or systems administration or networking or whathaveyou) then maybe exploring a computer science degree is worthwhile. But, if you don't have a passion already and you aren't much of a math person, then it is a double wammy against you from the start.
Maybe describe more of what you have already explored, what you are interested in exploring next, and your general proficiency in math and related classes and we can try to give you more feedback.
I had a friend in college who was a math major even though it was not a "natural" talent for her. As a female math major in the late 1980s, she was often the only woman in the class and she also received a lot of discrimination because of her gender. She said that it would take her 6 hours to do the homework that many of her talented male classmates could do in just 2 or 3 hours... but she didn't care. She loved _math_. And I believe she loved doing whatever someone told her she couldn't do. When other students crumbled, she put in the extra hours and stayed the course. She graduated with her Math degree with a more than respectable GPA. She certainly mastered her field and gained the respect of her peers in the process.
If you have a crazy passion and at least enough intelligence to figure stuff out given enough time and dedication, then pursuing that particular dream is more than possible and worthwhile.