Pelvic Pain/Short period - not ectopic

Hi. Long post ahead but I really need some help! 🙏🏽 I went to the gynecologist 2 weeks ago for some pelvic pain that I’ve had for a few months now. My period has also shortened to two days both last month and this month. At the gynecologist I had a urine test and ultrasound and they found nothing. In fact they ended up doing a second ultrasound and still found nothing but a small cyst both times. They told me to come back in a few months. I told them that my period was 4 days in December and then 2 light days in January. Now that they said they found nothing, I’m still freaking out because this month it was also two days. Back in August I had sex and the condom burst. First time in my life anything like that has ever happened. I took a Plan B pill and took multiple pregnancy tests. I’ve had a normal period up until last month. In September I also went to the ER for pelvic pain and I had a urine and blood test then and it was still nothing. Months later now I’m having these problems. Last time I had sex was on October and I had three normals periods after that. I was hoping to get answers from the gynecologist last month but I’m upset I got nothing. I just want to know if anyone has had a similar issue and what was the result. Could it stop be an ectopic??? It sucks because I currently live on another country and I traveled to get to that English speaking gynecologist. Where I live we have English speaking doctors but not Gynos which is why I traveled 2 hours. And my insurance is shitty and must pay for things up front. Please help me! Advice, experiences, anything!! 🙏🏽🙏🏽