No! Don't drink it. It just tastes bad and does not give you any benefits. Also, the most important thing to remember is the water contains germs which were in the lentils.That water was only used for softening it and cleaning off the germs.
Reproducible chest pain (pain only by pressing on the chest) is usually not angina but rather musculoskeletal. Such pain should be further discussed with your physician to further differentiate.
