PALE EMPEROR - I totally get and understand what you're going through. I too was a "born-in " JW from birth and didn't exit until age 44 about 13 years ago in 2003. You and me and others here were raised and indoctrinated to feel unnecessary GUILT and FEAR in our views towards EVERYTHING that's not WT or JW approved. WT Society worked hard to rip our self esteem from us as humans through the use of these GUILT and FEAR tactics - so it takes effort on our part to reestablish our personal self esteem. Which helps us proceed in a positive way in most things in real life needed to lead a normal, sane life. So what you are feeling is normal for someone coming out of a strong, controlling mind control cult - yet it takes work and effort on your part, my part, and re-educating ourselves after leaving the Witnesses in order to understand HOW the WT Society controlled us and to learn HOW to break free and start a new, happy life for ourselves. In time experience helps, but we have to re-educate our brain neurotransmitters with different information in order to get rid of the harmful WT indoctrination and way of thinking.
At 31 years of age you still have lots of time to get that medical degree you wanted and lots of time to pursue hobbies and interests you have as an authentic Non-JW human. I highly recommend reading Steve Hassan's 3 books on mind control and how it affected us in order to understand how to move on from it : his website is www.freedomofmind.com.
There is no reason to berate yourself, put yourself down anymore , or to think that your life is over. In actuality and truth - your life has just begun my friend. I mean, I'm almost 57 years old and hadn't picked up or played a guitar- ever until 5 years ago at age 52 . Now I've written almost 60 songs and am pursuing making music like I always wanted to in my teen years as a JW - but wasn't allowed the time to do so. You now HAVE the rest of your life to pursue any dreams you desire in a positive way if you wish ! I know it's cliché - but today IS the first day of the rest of your life my friend. Think about it - seriously- don't put limits on yourself- embrace the positive changes in your life and eliminate the negative influences ! WE are here for you as a support and friendship too- take care, best of luck to you ! Peace out, mr. Flipper