COULD I STILL BE PREGNANT HELP

Got off the pill in September only on it for a month and had regular periods until currently.

Last time I had sex was oct 31st he used a condom and he pulled out he did not cum. A week later I was due to ovulate I spotted a bit and got mucus . And 2 weeks later I got a heavy period on time (clots too).

The following month (December) I got a period but it was 4 days late it was also heavy had clots etc.. and in jan it was now 2 days early?? And a medium flow had clots too .