Symptoms you may be experiencing can be due to hormonal changes, which may not be indicative of pregnancy. An irregular period can cause the hormone levels to fluctuate, leading to tender breasts, bloating, and mood swings. Stress, diet, and lack of exercise can also be the reasons why your body is affected this way. Try managing stress, eating healthy, and gentle exercise to help balance your hormones.

Conceiving with PCOS is hard, but it is possible with certain approaches. PCOS might cause irregular periods, weight gain, and difficulty getting pregnant because your ovaries make too many male hormones. Your doctor can prescribe drugs that help regulate your menstrual cycle and increase the odds of regular ovulation which can bump up your chances for conception. These medications work by balancing out hormone levels while raising the likelihood of successful pregnancy. 

It is normal to be thinking about pregnancy when faced with a situation similar to this. The white mucous discharge during which you are going through might be a yeast infection one of the reasons for which is the pH imbalance of the vagina. The best advice in this situation is to have a pregnancy test to ensure yourself if you are pregnant or not, and maybe the second option you should take into account is emergency contraception if you are afraid of getting pregnant.

The "risk for fetal aneuploidy is low" means that the probability of the fetus having an abnormal number of chromosomes is considered to be low which is a positive indication.