Pressure after miscarriage

I just finished my first cycle after having a miscarriage at the end of August. Cycle ended about 6 days ago. I've been experiencing pressure in my abdomen and slight discomfort. It's not painful unless I move a certain way really fast. I know it's way too early to tell if I'm pregnant but I've heard that women are more fertile after having a miscarriage. Is that true and could the pressure be because I am pregnant? I've also been tired a lot recently but I've not noticed any other symptoms.