Well, I've come to a crossroad and soon I have to make a decision: to do a 2nd BSc in computer science at the age of almost 30.

Thing is: I got a BSc in biochem (2:1) and a MSc in biomed (merit), but I did poorly on the MSc. My MSc supervisor told me to give up on science. This discouraged me greatly and despite trying to find an entry-level lab job, I've failed to be anywhere near a lab for the last 2 years.

Anyone in a similar position? Someone who successfully changed career paths at around 30 y/o?