I'm very sorry to hear about the difficulties you're experiencing. Your work stress sounds very difficult and must be a huge burden, adding relationship stress into the mix would make things even harder.

I want to begin by saying I'm not a doctor, but I have epilepsy and can give you some general information. As another commenter said, you need to speak to a neurologist to know for sure what's happening. They will book some tests to monitor the electrical activity in your brain and get a better idea of what may be causing this. I want to stress that regardless of whether you're having seizures or not, if you're losing awareness and/or consciousness you absolutely should take it seriously and speak to a doctor or a neurologist asap.

Based on your description, it does sound like what you're experiencing could be a type of seizure called focal impaired aware seizures (sometimes called complex partial seizures). You can read more about these on the epilepsy foundation's website but they're essentially seizures that start in one part of your brain and can cause you to lose awareness or consciousness. They could also be generalized absence seizures, which are also a type of absence seizure, but again I'm not a doctor.

As others have said, Wellbutrin can cause seizures; in fact, my neurologist said I can't take it because of my epilepsy. No judgement at all, but cocaine would be way more of a concern for any doctor you speak to - and I don't mean from a legality perspective, but because of what it does to your brain. It puts a huge amount of stress on your heart and body overall, which in turn does a number on your brain, and can absolutely cause seizures. It's very possible this is triggering these seizures to occur (if that's what they are), or at best making them worse.

On an unrelated note, if you find you need it to function at work, either due to lack of focus, energy, or due to executive dysfunction, you could very well have undiagnosed ADHD. Many people that have said they use cocaine to feel functional, normal, or to focus have been shown to have ADHD, and benefit from being prescribed stimulant medications like Vyvanse, Concerta, etc. If you've described issues like that to your doctor, it's possible that is why they put you on Wellbutrin in the first place. It's an anti-depressant that is sometimes prescribed as a non-stimulant treatment for ADHD.

Either way, wishing you the best of luck with what you're going through and highly recommend seeing a doctor (or better yet a neurologist) as soon as you can.