In your relationship you're facing a tense time. That's partly due to you feeling uncertain and rather vulnerable. Try to prevent any arguments by making time for each other, listening to what your partner has to say, and being more sensitive to each other's wishes. But it's certainly just as important to express your own wishes; importantly, without complaining.
You are rather irritable and risk suddenly losing your self-control, especially when engaging in physical exercise. Your bad temper can get you wound up over the slightest issue. Any failure in your own performance or of any fitness equipment worsens the situation! Remember neither excessive ambition, nor aggressive competitiveness helps your inner balance and composure.
You feel misunderstood are easily provoked and tend to be rather combative, which is not appreciated by your colleagues. Think about whether it could be more beneficial to give way, instead of insisting on your own point of view. This approach would certainly make for a better atmosphere at work and in the long run ensure better results that everyone will be happy with.