I'm in a M/s relationship & have a few thoughts for you.

First this question seems pointed at how to deal with you Dom. So I advise you to get on FetLife & ask other subs. They have a great community & it's packed with information, especially D/s. I'm not sure of the answers you will get here.

A blaring red flag that I see is his approach to you at work. That's a major no no in several areas & crosses many lines.

Another red flag I see is that you stated you have no safe word or contract. Why? I'm guessing you had many meetings to go over every issue that might occur & trust him enough in all these situations? How well versed are you to a bdsm relationship? Have you studied it? Has your Dom? Is he vetted in your community? How well do you know this man? Did you go over soft & hard limits? And what if you're backed into a hard limit with no way out?
You've put an enormous amount of trust in your Dom, yet you have no rules or guidelines. What does he expect? What do you expect?
A Dom or Master, imho, is supposed to be able to crawl inside your head to set up this power exchange, BUT I also feel it is their RESPONSIBILITY to teach, improve, guide etc the submissive into a self confident, powerful woman. This is how I see D/s or M/s relationship.
What is he teaching you about yourself? How has he dealt with your past? What is his philosophy onbeing a Dom? This you should know before anything! Is it just based on power? Submission? Sex? These things you should already know because hopefully he laid out what he expects from a sub. Is this a TPE???

To give our submission to a Dom is the ultimate treasure that we offer that must be protected, appreciated, nurtured & cultivated.
Do you understand your submission?
Is this a game? A Mind****? As with all relationships communication is key but in bdsm it's paramount.
Wish you all the best!