Looking for advice

Hi all my dog successfully mated & locked 3 weeks ago & again 2 days later , I’m wondering if there’s a way I can get an idea of if she’s pregnant or not without going to the vet. She’s booked in for a X-ray in a couple weeks so would rather not have to pay for both a consult now and an X-ray then as well if I can maybe get an idea from home myself :).