"I then rode her on sunday and she seemed to go lame again. So I got off and let her off into the field where she was obviously lame"
This alone tells me she may not be 100% and that a vet should come and check your mare out and make sure she's healed. The thing with soft tissue injuries is that it takes a LONG time to heal and the chance of re-injury is high.
You want opinions on your horse's health and I'm happy to give them - but please don't shrug off opinions because it isn't what you want to hear.
Your vet needs to come out and have a look at your mare. They need to give you an idea on the damage and whether or not you should be riding or giving her time off. They will also provide you with a detailed schedule for bringing her back to work.
We aren't there, we can't see the horse move, nor do we (or I anyways) have a DVM and access to an US machine - all of that is vital to giving you useful information. We cannot give you accurate information. You say she was lame on Sunday - that means the injury may not be healed - but we don't know, and neither do you or your trainer - you need a vet.
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