Why am I experiencing cervix pain, bleeding, and cramps?

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

Implantation bleeding is a light discharge that is caused when a fertilized egg attaches itself to the wall of the uterus. It usually happens 6-12 days after ovulation and it can be confused with a light period. Nevertheless, noticeable blood loss or very strong pain may indicate a more severe problem. If you have any concern, please visit a gynecologist for a thorough examination.
 

It's normal not to have any pregnancy signs initially. Symptoms typically appear a few weeks after conception, such as a missed period, fatigue, and nausea. Missing your period this month might indicate pregnancy, but not everyone experiences early symptoms. The most reliable way to confirm is by taking a pregnancy test. A brief wait and a quick test will give you a clear answer.

There isn’t much of a chance that you’re pregnant. Your partner didn’t ejaculate, and there wasn’t any pre-cum. Also, your period came on time. If you take extra pills or have breaks in your pack, it can sometimes affect your hormones. However, only making this kind of short-term change may not result in long-term problems. Getting your period after taking 5 pills and then going off them could have caused some hormonal changes but if eventually things evened out when it came back.