Insect and Spider Identification: Help!, 2 by Newbie123

Newbie123 wrote:
Hi all,

I just returned home from several weeks away (I live in nassau county, long island, NY). When I pulled back the covers on my bed, I found tons of tiny little critters. Most were dead, though I found one alive crawling on the carpet floor slowly. Thinking they might be bed bugs, I quickly checked the seams of my mattress and found several more - dead. However, they just don't look like bed bugs! Does anyone know what these might be? I took the best pictures I possibly could.

Thanks!