Opinions ....yes Im glad you are bring this up to your therapist because there are many things that can cause having these kinds of feelings.

example when I get these same feelings now sometimes its a sign that I am in my depression phase with either my seasonal depression / PTSD or my bipolar disorder. Sometimes it means my medications for any number of my medical and mental health issues like MS, heart disease and anemia or my depression, bipolar disorders or my PTSD, Anxiety disorders needs tweeking/adjusting or changed. they also check my blood work weight and other vitals to make sure my eating disorders are not affecting my health. and of course dissociative tests to do a check on my depersonalization/derealization disorders. for me its quite a process of mental and physical health questions and tests sometimes because I have so many physical and mental health issues.

this most recent time I felt like this and chalked it up to a dissociative or bipolar issue. luckily I saw my therapist and physician. I had to go through evaluations because of this problem and yesterday we (my wife and I) were told the reason for my feeling like this... I am pregnant. it just amazes me how many things can cause the same symptoms. now that we know what is causing my symptoms medication, plenty of rest and diet adjustments and of course time for my body to adjust to the little life I now carry for the next few months I will be back to my normal self.

for some people the evaluation is a piece of cake for others its a huge time consuming process with a wait for the results time varying from a month or two depending upon what is causing these symptoms. you will do fine.