May be its Reduviidae, ambush bug

Reduviidae is a large, cosmopolitan family of predatory insects in the suborder Heteroptera.

Source(s):https://www.google.co.in/url?sa=t&rct=j&...

It may be a kissing bug . They bite people and can carry Chagas' Disease .

It is one of the species of assassin bug. Not as bad as the name says, as they are not usually aggressive, but can bite if handled improperly.

https://insects.tamu.edu/fieldguide/aimg...

Found this bug in the sheets, desperately need to know what the heck it is!