Hi im a female, 21 years old, i have never had anal sex and have had no health issues in the past. I havent felt stressed lately or done anything out of what i would normal do, When i went to the toilet this morning i tried to go but only a slimey, strong fishy smelling, yellowish, gooey thing came out about 4 cm in length from my anus , im really worried what this is and its cause? Should i be going to the doctor?