What is biting me, and how do I get rid of it?

Hard to really tell, but it could be flea bites. What part of your body are they mainly biting?
Also, are you outside much? If so, it could be chigger bites. chiggerbite pic

Just my lower legs. How do I have fleas w/o an animal? I’m not outside much, but I did do something abnormal and walk through the grass to get to my front door instead of the sidewalk the other day…

If you are renting an apartment, the fleas could have already been there. Also, you can carry fleas in on your shoes. If you have been in the grass, it could be chiggers. The go for your lower legs, behind the knees, your ankles and feet.

So how do I get rid of them? Some type of spray?

chiggers Look at this page and see if it can help you. Looks like calamine lotion, cortizone, and benedryl lotion will help. Hope you have some on hand.

Would they be able to travel on flip flops? I thought bug usually go for shoes they can grab onto. And thanks for the link

They could. I really don’t think it is fleas in your house though. You would have seen them. The chiggers you can’t see, so I would think that’s what is biting you.

I just noticed the pics link. Mine don’t look that bad.
Do you think a generic bug spray would help at all?

The first picture on the link doesn’t look too bad.
It probably wouldn’t hurt to spray. And if you have carpet, run the sweeper real good to suck them up if they are in the house.

Will do. Thanks @chyna !!