your age will not be taken against you. I had two friends from undergrad who were 33 and 36 when they were admitted to a top 20 US med school. You can continue with your Computer science degree if you like it. But also do the pre-reqs for the medical school and take the mcat. You don't need a Biology degree to get into med school. Keep your gpa up and get a good mcat score. You will have great chance in US med schools in 3-4 years.

__________________