My ears sometimes start popping after intense workouts. Say I'm 3 or 4 miles into my run, or I've been mowing my lawn in intense heat.
In my case, it's due to the intensity of a workout and my heartrate has been elevated for a while. I also get it from heat exposure.
Make sure you take plenty of fluids. It could also be due to the fact that you're engaging in intense workouts and your body hasn't adapted to it yet.
I've noticed you haven't been posting your training sessions regularly. I don't know if it's due to the fact that you haven't been training regularly, or you simply haven't been posting.
If it's because you haven't been posting, I suggest you do so, and accurately. Reason being in 3 or 4 months, you might want to look back and check on your progress (our memory always becomes faded)
It's also important you be accurate in your logs. When I started, I posted that I was doing bench press sets of 10 reps with 225 lbs. I can't do that now even after 3 or 4 months of logging. I later realized that when I started, I wasn't familiar with the weights I was using and may have counted discs of 25 lbs as 35 lbs (you get the idea)
Going over your training history, I see you began doing sets of 2 pull-ups and are now doing 12. You're going to want to know how much you are doing to track accurate progress. If you're not doing 12 and in 6 months, when you are, you'll look back, see you were doing 12 6 months earlier and think you've made no progress.
As for your objectives, I made the mistake of trying to tackle all of them at the same time. I had endurance goals, strength goals, and cardio-related goals. Trying to tackle them all at the same time meant I was undergoing 1 hour training sessions 6 days a week, not including my PK workouts which were an additional 3 hours or so a week. This quickly lead to injury due to muscle fatigue. My two cents: Tackle your goals separately, one at a time, or separate your strength goals from your endurance goals and tackle strength first, and move on to the endurance goals when you have accomplished your strength goals
Well, I hope this helps and look forward to following up on your training.