Miscarried 2 weeks ago

Samantha
I miscarried 2 weeks ago naturally at 4 weeks. I've had sex a few times after i was done bleeding, my bleeding only lasted a little under a week. Now, I have a couple symptoms, took a test, and thought i saw a very faint line. My hormones were 0,could it still be from the miscarriage or is it possible to get pregnant so soon?