Hello. Girls, please tell me, I need your help. Last month I found out…

Hello. Girls, please tell me, I need your help. Last month I found out that I was pregnant. We were using protection because I wasn't ready yet, but it still happened, and at a very early stage, we terminated the pregnancy with pills under a doctor's supervision. We were supposed to have an IUD inserted, but before I could get my period, the tests started showing two lines. I took several tests, and there was a delay of 14 days; the doctor also said that this could happen. Although we only had protected intercourse once. And today, I suddenly started my period. I don't understand, is this a miscarriage or just my period? And could the tests have been wrong several times? Please tell me if you know. (Sorry for the photo.)