No. Since you have a degree you can commission as an officer via OTS. You can speak to a recruiter at your local station. When you get there specifically ask for the officer recruiter and don't bother with the enlisted route. Officers are paid, treated, and generally live better. In terms of occupation specialties... some give extra pay, some might be relevant to your skill set, its up to you.
Each branch has their pros and cons. do a lot of research on each of them. I'm biased towards Air Force personally; they have the best quality of life all things considered. Regardless of branch of you end up marrying your fiance the both of you can live outside of the barracks and move into your own home and the military will pay for it (up to a certain degree. Look up military pay calculators). That being said TALK TO YOUR FAMILY before considering the military route.
Also maybe consider the guard/reserves. If you end up actually finding a civie job you can reap in some military benefits/extra pay on the side.
protip: going off of what I posted earlier in >>10286824
, the benefits of people from the service are underrated. we live in post-911 america of christ's sake. So take advantage of them to help you find a career; plenty of businesses have special programs or considerations for vets. https://www.google.com/about/careers/veterans/our-community.html>>10286841
On the topic of your chem degree; sure, it might be somewhat of a black mark, but not for the reason you think. Generally there's this meme in the cs field that scientist are shit programmers, but if you can show you've made some tight contributions to a project or have a robust GitHub then fuck'em.
So, you have a lot of options here. Go full military. Go reserves/guard while pursuing a /g/ career. Or just go full /g/. These are just some ideas but I help they help man. Consider going to your old uni and scheduling an appointment with a career counselor.