Early period

My period usually occurs the first week of every month. My cycle happens every 30-35 days however I had my period November 21-26, skipped December then got my period January 2-6 and I ended up getting my period AGAIN on January 30- feb 4. It started off light then got heavier.. I’m just wondering if this could have been implantation bleeding (I had sex January 15th and we used a condom and he pulled out before he came) I’m probably overthinking but pls let me know ur thoughts