Bug bite?

So I keep feeling like I'm getting bitten in my bed. I get these red dots on my back and legs and the next day they go away. I've checked for bugs and theres none. The don't look like ant bites at all. They also don't have a little pimple looking thing in the middle. This morning I think I got bitten by an ant. It looks like a regular ant be except that the redness keeps growing and spreading. I'm not allergic to anything. I feel like I'm freaking out over this bug bite for no reason but can someone tell me about the bed but there's no bugs? (Last question didn't make sense sorry)