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Occasionally, periods can be a bit of light bleeding which can be mistaken for an early pregnancy. In addition to that, there are also symptoms like nausea, breast tenderness, and fatigue that can be a sign of pregnancy. Nonetheless, having a period is not a definitive indication that you are not pregnant. If you're worried, taking a pregnancy test is a good idea to make sure.

There is no chance of getting pregnant from sperm touching your skin.

Masturbation does not cause pregnancy. Check with your gynec for your periods.

Certain medical professionals may perceive you as slightly old for childbirth at 35, although it is feasible for several females. Irregular periods or difficulty conceiving are among the symptoms you might experience. The fundamental factor is that the quantity and quality of your eggs diminish as your age advances. However, you need not worry since there are various methods such as fertility treatments which can be used to enhance your chances of becoming a parent. 

Fatigue and vomiting may indicate pregnancy if your period is missed. But these signs may also be associated with other medical illnesses. It would be advisable to consult with a gynecologist

Taking the i-pill might result into hormonal disturbances in your body which in turn might disrupt your menstrual cycle. It is always recommendable that you see your doctor before taking any drugs for contraception purposes.

Taking emergency contraceptive pill after unprotected sex may lead to the changes in the menstrual cycle including irregular bleeding. Yet, bleeding within a week of taking an i-pill could also be a sign of hormonal imbalance or other medical conditions. However, the best option is a detailed examination and treatment by a gynecologist.