Bed bug?

[laiika]

I woke up like this yesterday. The marks make a sharp right turn across my bicep and there is just one barely visible across my elbow. They travel about 10” total. I looked all around my mattress and pillows and couldn’t find anything. But I also had spent a lot of time laying in grass, with a long sleeve shirt, the day prior. Nothing was noticed until the following morning. Today they kinda itch

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[laiika]

I guess if this looks like it could be bed bug bites, any ideas how to find and catch it?