Is she pregnant?

Last week on Monday, me and my girlfriend had unprotected sex (I know, unprotected).

She stopped taking her birth control pills a month and a half ago and we had sex two days before her period.

I didnt ejaculate in her either, yes I know about pre ***.

Instead of her period, two days after we had sex, she had spotting. So she didn't have her period, she missed it because she still doesn't have it.

She has symptoms like, cramps, nausea, fatigue, and mood swings.

She asked her mom about it and she says that she missed the period because her body is still readjusting from stopping the birth control pills she had. She said that the other symptoms was because she had a stomach flu.