Anaemic- pulse faster than normal can be at 140 when sitting,usually get palpitations and chest pain but been a lot worse lately, should i get checked?

Yes: Because you are anemic. This is unacceptable. It's interfering with your ability to function at your best. If the cause is known, you owe it to yourself and those around you to be treated. If not, you owe it to yourself to demand a complete workup. Even in a young woman with monthly blood loss, an anemia should prompt a search for where else bleeding might be coming from. Best wishes, be proactive