These symptoms can be experienced by some women during their menstrual cycle. They can be caused by hormonal changes and are not necessarily indicative of pregnancy. 

If your tubes are tied, the chances of becoming pregnant are significantly reduced. However, it's important to note that no contraceptive method is 100% effective. If you are experiencing symptoms take a pregnancy test to confirm.

Taking Plan B after unprotected sex can reduce the risk of pregnancy, but it is not guaranteed to prevent pregnancy entirely. If you had a period for 12 days after taking Plan B, it is less likely that you are pregnant. 

There can be factors contributing to changes in vaginal pH balance and the occurrence of vaginal infections. Sexual activity, particularly with a new partner, can sometimes disrupt the natural balance of bacteria in the vagina, leading to infections like bacterial vaginosis (BV) or yeast infections. This can happen due to the introduction of new bacteria or an alteration in the vaginal environment.

Your chances of getting pregnant a few days before your menstrual cycle would be low but not impossible. Ovulation mostly occurs in the middle of the menstrual cycle, and the most fertile window for conception is a few days before and after ovulation. 

There is always a small chance of pregnancy, especially if your menstrual cycle is irregular or shorter than average, the occurrence of your period is generally a good indication that you are not pregnant.

Staying for a long period without sexual activity does not typically cause a woman to experience continuous orgasms or indicate a problem. Orgasms are subjective experiences that can vary greatly among individuals. Some women may have multiple orgasms in a short period, while others may have one or none at all. Consult you gynec.

Periods are usually delayed due to stress and hormonal changes. Check with your gynecologist and get proper treatment if its delayed for long.

A CA 125 level of 35.10 is within the normal reference range for most laboratories, as the normal range can vary slightly depending on the testing facility. Generally a value below 35 U/mL is considered normal. 
CA 125 is a protein marker that can be measured in the blood. It's primarily used as a tumor marker for ovarian cancer but it can also be elevated in certain other conditions.

PCOS is a hormonal disorder that affects many women of reproductive age. While there is no cure for PCOS its symptoms can be managed effectively through various approaches through medications, diet & nutrition,lifestyle modification, etc. Consult your doctor for proper course of medication.

It could be residual blood from your previous period, hormonal fluctuations, or a sign of an underlying condition. It's challenging to determine the exact cause without further evaluation. If you continue to experience abnormal bleeding or have concerns, you must consult with your gynecologist.

If you are experiencing a significant delay in your menstrual periods, it can be due to many reasons like stress or anxiety, hormonal changes, pcos, etc. Consult your gynecologist for proper evaluation and treatment.

Its generally considered normal and not a cause for concern. It can occur when the blood takes longer to leave the uterus and partially oxidizes.

No masturbation doesn't cause pregnancy. Kindly check with your gynec for your missed periods.

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.