You might have dyscalculia.
Maybe try this screening test: http://app.educational-psychologist.co.uk/screening/dyscalculic/questions.aspx
What is your major? I assume it is one that does not have high math requirements?
Look at this post for ideas on how to do well in a class.
http://talk.collegeconfidential.com/college-life/1920853-college-is-a-step-up-from-hs-16-tips-on-doing-well-in-college.html
See if your college has a math center…if not, they have a tutoring center. Use it.
Watch Khan academy videos. Do extra problems.
Also read this for someone to relate to.
http://www.slate.com/articles/life/human_guinea_pig/2006/11/the_math_moron.html