One other thing, if you do burst a blood vessel in your finger, make sure you remove any rings or other restrictive jewellery immediately.
This may sound daft but a very similar thing happened to my 45 year old extremely fit uncle some years back, who developed chest pains and shortness of breath over a few days until he collapsed. Taken to hospital, it was discovered that a small finger injury coupled with a tight wedding ring had trapped a small blood clot which eventually worked loose and travelled to his ticker. It was touch and go and a lot of blood thinning drugs for a couple of days but thankfully he is still with us.