Spotting after sex w/ paragard?

Hi! Okay so i’m nervous, I’ve had the paragard since March ish of 2019 and it’s been working perfectly. but everytime I have sex in doggystyle position, I spot after. It never happens in any other position, only in doggy (i think because he hits my cervix more?) is this anything to be worried about? my strings are still in the same position and I kinda only barely spot for a day or two, but it still makes me pretty nervous. thanks for any info !