How do I deal with the emotional changes?

Adaption is a big part of being human. What caused you to have these emotional changes, do you feel that they're healthy or useful changes to your environment? All good questions that you should ask yourself.

Be aware of your emotions with your surrounding or events. Note out your current emotions and triggers. Do it for a week for a start. Maybe you come to realisation on why your emotions change by time and come up with something :)

When its uncomfortable, just think, "this too shall pass."

Depends on which way your emotions change. Going from happy to sad is often harder than going from sad to happy. But emotional changes are natural things so it's not something to be so afraid of, acceptance and understanding of yourself and your emotions is key

It's normal to have changes in your emotions or even mood swings as we are all susceptible to feeling like we are unable to control our emotions. Although this is normal, if you feel like you genuinely can't deal with your emotions and that they are completely slipping out of control, then definitely contact someone you trust to talk it out or see a therapist to seek help. If you're dealing with emotional changes in the moment, take some deep breaths or try some relaxation exercises. Try thinking of some positive things or about some good memories. In the long-term, you could try starting a hobby to try and manage your emotions and setting some time out daily/weekly to reflect and take a breather.

Emotions are an important part of us and for this reason it is important to listen to them, let them flow within us, feel their effect and internalize it. The important thing is to practice recognizing the emotions that arise within us, in order to understand what emotion I am feeling and in this way it is possible to train yourself to manage emotions in small steps. Because when you are able to recognize emotions, you can search within yourself for what need they arise from. What is the need we want to satisfy and for which that emotion is born in front of a specific event.

Emotional changes can be difficult. I've found in life that sometimes emotions can act as driving forces when I don't feel they should for me. For instances, feeling an attachment to a specific goal as it would make x person happy. With emotional changes what has been helpful for me to think about my emotions as temporarily (like burst of energy when working out) though it can honestly be difficult. Sometimes when emotional changes are present, it has been helpful refocus my energy on things that are productive like drawing, running, etc. in my life to handle emotional changes. Even talking with friends and family has been useful.