welcome to HCM.
Your clinical presentation is more revealed with INCOMPLETE ABORTION
or Early IMPLANTATIONAL Bleeding.
More likely corresponding with irregular bleeding pattern and regular sex after abortion.
So it is better to do a USG of pelvis for evaluation of intrauterine pathology.
If there is incomplete abortion,then need to evacuate the product of conception either by D & E or by Medicine.
Anything behind this,need consultation of your doctor and some clinical examination for further treatment.