Hi there ~
There is cause for concern. You should consult a gastroenterologist
who can help diagnose the condition if you are having that much weight loss
within a short span of time and have GI symptoms. You may also benefit from seeing a psychiatrist
to vent out what is happening in your life in general so as to make sure there is nothing that can be attributed to a psychiatric cause. I hope this helped.
Take care and have a lovely day!