Crystal Meth and Vaginal Bleeding.

Started noticing spotting after sexual intercourse (light blood spot in wet patch), gradually over a few days that turned into irregular spotting and have only experienced an actual (light) blood flow once or twice over the two weeks i’ve had these symptoms. This comes and goes during the day and sometimes goes unnoticed thinking maybe it’s over until sexual intercourse but because of the insignificant amount of blood, it hasn’t come to my partners attention but has mine and I do get very insecure about it. It’s starting to get frustrating and I know there could be an off chance that this could eventually get worse. I’ve read a lot of threads on the topic, making me think that using is substantially the cause to the abnormal bleeding. I haven’t found fixes apart from the obvious, or anyone suggesting how long this can go on for and/or even risks this could esculate too. Hence the depth of my question.

Thank you in advance.