If anything, I would apologize to the supervisor's manager and not necessarily to your supervisor. My previous boss and I did not get along, and there was a day where we were in a meeting and he was berating me loudly and I was over it and responding just as loudly. It got to the point where the CFO (HR's boss at my company) had to get involved and mediate. I was extremely embarrassed about the situation, but didn't feel like I needed to apologize to my boss. This had been our relationship for awhile, and frankly I didn't want to be the bigger person lol (he didn't apologize to me either btw). I did however, apologize to the CFO for my behavior the next day. The interesting thing that she said, was that showing emotion at work means that you have passion for your job. The key is learning how to channel that emotion in a productive way. I ended up staying at that job for about 9 more months (I was in the final year of my MBA, job hunting already, and this job was giving me good experience). During that time there was a meeting with HR, a formal report was filed about the incident, and I asked for tips on how to work with him. The end result was that they separated my boss and I, so he sat with the other division he managed. He still had to sign off on budgetary things, and I had to update him monthly on my projects, but otherwise we didn't interact (I was already kind of a silo division before this so it wasn't a big deal). The point of sharing that story is that emotions happen at work, and they aren't necessarily a bad thing. If you feel guilty about it and it's causing you stress, apologize, if it's not, then don't. You don't have to apologize if you do not think that you did anything wrong. The more important thing is how everyone moves forward from this. Unless you are going to quit or can move to a different department immediately, you still need to do your job and to do it you need help from someone. If your lead is too busy, then you either need to be pointed to someone else or their workload needs to be shifted so that they can have time to help you. There is no shame in going back to the supervisor's manager and saying "I know that things got heated last time, but I don't feel like a solution was found. I want to make sure that I'm doing the best thing both for the clients and our company, so I need someone to turn to. If it's not the lead, who else would you recommend?" How the supervisor's manager handles this will honestly tell you what your next steps should be. Lastly, start documenting everything. Even if you are going to start looking for a new job, document every instance of the bullying and the lack of help when requested. That way you are protected in case something else happens. Good luck! Office politics suck, especially right now when everyone is already on edge.