Weird cervix. Help!

So this morning when I was checking my CP my cervix felt bumpy. Like there was little bumps on it. Not my vaginal walls or anything, just the cervix itself. I'm pretty sure this has never happened before. I'm 4 DPO and I only had sex on my second to last ovulation day. Also had a pap last week April 5. Don't know if this is a bad thing or not. Does anyone have any idea what it means?