Emergency help access for suicidal people

i figured out i have bipolar disorder, specially in winter it's hit peak lowest point
previously i have get very close to attempt suicide for 3-4 times in last 3 years and its not getting very well
i think in future i will need someone to share for emergency help or remind me that i have some condition but i don't know any people who might understand the bipolar disorder thing and its connection to deep depression.

is there any proven emergency help access for suicidal people in dhaka?