Lighter bleeding

Hello everyone. I was on the pill for two months from the beginning of July to August. 2 weeks after I got off the pill I had to take plan B due to an accident 🤦🏻‍♀️ that was my last intercourse.

Ever since then, my period is getting lighter and lighter each cycle. It’s gotten to the point where I’m only having light bleeding for two days only. I’m also experiencing horrible and extreme mood swings. I used to be a HEAVY bleeder and it would last 6 days.

I also started feeling twitches, spasms in my lower abdomen. I swear they feel like kicks. I feel nauseous, dizzy and have decreased appetite. Also, my stomach is growing.

I’ve taken at least 10 at home pregnancy tests and two blood tests. They all came back negative. My doctor said they are probably my intestines. Never in my life have I experienced this feeling.

I am absolutely petrified of being pregnant.

Has anyone experienced this before? What do you think is the cause of this?

Thank you