At age 24 breast itching and pain is not likely to indicate cancer. Skin allergies to household products like detergent, weight gain, poorly fitting bras, diary changes are a few of the causes. If you are thinking that you might be pregnant then check a home pregnancy test
There are not specific restrictions against drinking energy drinks during pregnancy. My personal opinion is that these drinks contains large doses of fairly unregulated components and should be avoided in pregnancy
Irregular periods are one of the most common problems Obgyns treat. If this is one time problem it usually resolves on its own. If this is a recurring problem you should be evaluated. Infections & hormonal changes can cause spotting. If there is a concern for pregnancy then do a home pregnancy test . There are many options available to help regulate the menstrual cycle. Schedule a visit.
Most of the time this is simply caused by the stretching of the skin. Schedule a visit with your obgyn for an exam to rule out any rash or other causes. Benadryl cream over the counter can help with itching
it is possible so a pregnancy tests would be wise. but you really need evaluation of the uterus to make sure there is no pre-cancer building up by missing all those periods. the longer your periods are irregular especially with pcos the high the chance of pre-cancer and cancer over time
One would not look at the results in the way that you are suggesting. You would not use the FSH to make a judgement about a day 9 Estrogen. It is probably best to schedule a visit with the doctor who ran the tests to explain how the results apply to your clinical scenario