Do any of you get these?

Does anyone get random red marks on their arms and legs that look like they can be bug bites and they itch a lot?
I checked my bed and I don't have any signs of bed bugs and I'm the only one in my home that's getting them sometimes I'm not even home when I get some, sometimes they start off like itchy spots then when I scratch they form the like bite mark red bumps.
I'm only 7 weeks n 6 days pregnant, could this be pregnancy related or am I actually getting bit by Mosquitos or nats and not noticing those suckers 

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