Cramping 7 days before my period

So guys I’m really nervous because this never happen to me before. I been cramping for the past two days and spotting with brown discharge. Me 20 and my boyfriend 21 just lost our virginity to each other. We had sex twice with a condom both times. I took a pregnancy test because I’m so inpatient, it was negative. I had my period every 22 days, always on time. The last time I was on my period was the 24th (the day after me and my boyfriend had protective sex). I’m just nervous because my mom is on her period and we are usually in sync with each other. Please someone try to calm down my nerves or just tell me straight up lol. Thank you