SOMEONE PLEASE HELP ‼️‼️‼️‼️ seriously

Can someone tell me what this is ?? Bug keeps popping up on and off we do have a cat . This is what the bug looks like & what the bite looks like when it happens 
UPDATE : I would like to thank all of you for the advice given we barely slept after finding out it was indeed a bed bug . We had an exterminator come out & examine the home , carpets , furniture, beds , you name it . It narrowed down to my moms bed apparently the bed we bought had bed bugs in the box spring 😡😡😡😡😡 although it was only 1 he exterminated the room & he didn't find any other bed bugs in any other part of the home at all . To be sure we got an amazing bed bug product & bought bed covers and had him exterminate. THANKS AGAIN YOU GUYS !! Much help 

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