i just noticed a black dot on the inside of my mouth. when i feel it with my tongue it feels like a blister swollen. but it s black, i thought may be blood clot. i can t remember if i bit the side of my cheek or not. but if it s not from me biting, what else can it be? I m very worried .i am a female
Most probably it should be a blood clot, and you can get it checked by brush biopsy which is a non-invasive method to check oral lesions which can check malignant cell by an accuracy of 1 on 10000 cells.  It may be a harmless pigmentation, so you just need to examine it and take appropriate steps only if you need any change in its size or if you have any pigments. Thanks and regards.