MY Weimaraner was out in the yard and a english bull dog got ahold of her she was still spotting at the time I am a first time dog owner and don't know what to do

Take her to the vet. The dog can be spayed and a pregnancy aborted.

Spay abort is one option.

Or, you can take her to the vet for hormone injections to abort the pregnancy.

However; unless you plan on breeding your dog, the less traumatic way is to do a spay/abort procedure.

If you decide to keep her in tact, I would also advise you to fix your fence. This will not be the first or last time you're going to have this problem. Male dogs are relentless when it comes to a female in heat.