Is this bed bugs?

Can anyone tell me if these are bed bugs?

So far only found three the first oicture is the smallest thy I've found.

If they are how to get rid of them and would gettting a whole new bed get rid of them?

My son fiance and i have been getting some kind of bites on us since january thats been severly itching and we've thought they was flease cause my mom has a dog and just now spotted these today

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