emmalouise92, have given you a great support!
Everything she said is correct.
Experiencing spotting or light menstrual flow at the time of normal menstrual period can be a sign of implantation bleeding (is believed that spotting is caused by the fertilized egg burrowing into the uterine lining).
About 50% of women who experience bleeding during early pregnancy will continue to have a normal pregnancy. However, up to 50% of women will experience a miscarriage at some point after the bleeding starts.
Cramping in early pregnancy is not only common but very normal.
It could be implantation cramping, followed by cramping due to growing uterus, that prepares for carrying a baby.
Increased discharge is a normal part of pregnancy, too, and its reason is to keep the vagina and womb from infections.
All these changes, especially bleeding and cramping (if it is too intense) can be a sign of miscarriage.
Vaginal infections can lead to vaginal bleeding and spotting between two normal menstrual periods.
My suggestion is to get a pregnancy test and ultrasound check up by your gynecologist.
Tests for STD's are important, too.
Have you noticed some breast changes, like getting darker spots at the area around your nipples?