For the last 3 months my mensturation is 'weird'. it usually have heavy flows with lots of cramps now i hardly have cramps and the blood is dark and slimy - i hardly use a tampon because it is so little. must i go see spesialist?

Change in menses: If your current menstrual periods are 28-34 days apart, and pregnancy is not a concern, this may just be a normal variation for you. If you are referring to only bleeding, and it is possible for pregnancy, see your gyn provider for an exam and a serum HCG test, as early ectopic pregnancies may have bleeding associated , which should be addressed immediately.

Good idea: Since there has been a major change , it is prudent to get examined just to be sure there is nothing serious.