Missing Tampon or just full of poop

Victoria
Hey ladies, 
So I'm currently on my period and Tuesday was the last time I used a tampon , but I'm not entirely sure whether I removed it or not because today Tuesday I felt light pressure as if something was poking me . So, I did a slight DIY exam by feeling for it. I felt this pointy think , but every time I pressed on it I felt the need to poop. I then took a delightful poop when soon after I felt pressure as If something was poking me again. What is wrong with me ? After how long should I go to the hospital?