I am 25 y/o,female, and I am wondering if current symptoms may be related to progesterone deficiency. Usual PMS symptoms, mild pain behind the left knee, anxiety, mild chest pains and mild tightness in the chest (like its difficult to take a full breath). On day 36 of cycle, however irregular periods. Symptoms are all on and off, and never unbearable. What worries me the most is the chest pain, albeit mild and not steady, and may be from the anxiety.