Well first I don't understand how seeing a doctor would result in loss of employment, or for that matter that the employer would even know - don't tell.
There is really nothing you can do that is better than get your partner in to see a doctor. You are listed as in the UK, so medical care is provided by your government, right? Thus, the cost should not be a consideration if one is looking for reasons not to do the correct thing.
You mention murmur, and I wonder how that is known.