I fell about a week ago bringing in my dog and since then my elbow has been hurting. It seems to lock when bent, I have severe pain when I try to push or pull or lift something. I have trouble lifting and trying to hold on to something
.. like I have know strength.

We certainly can't diagnose you over the Internet. You'll need to see a doctor and possibly have X-rays taken.

See a doctor and be treated properly, to heal properly.