Thanks for the query to H. C.M . Forum.
Since, how many days, you are having diabetes
type 1 ?
Also possible upload the report of blood pressure and diabetic related reports.
As this may be age related symptoms due to diabetes.
Following may be the reasons,
Postural hypo tension.
Orthostatic hyper or hypo tension,
Hypogycemia ( decrease sugar level), Stress
Last of all
due to prolonged palpitation
Consult a physician / diabetologist
and get their opinion which will decide the reason.
Hope I have answered your question.
If further any question I will help.