Miklaoz.. i think if it was ectopic youd be in alot of pain and have bleeding. If it is you are pregnant, i would honestly say that its just stretching, or even, like you said, maybe some constipation pains are they too are linked to pregnancy. Have you any pregnancy tests handy? Might be worth doing one to find out. Also remember every pregnancy is different so you may still feel some tightening and stretching you never felt before.

