 [ Symptoms ] i have been having some twitching in my muscle mostly in my right thigh is it serious or am i overreacting  they are not painful and only seem to happen at the end of the day when i lie down to sleep there does not seem to be any noticeable weakness in my muscles and i do not really have any other symptoms everywhere i look either says it is nothing or a serious condition i do not want to see a doctor about something so trivial but i have a bit of anxiety about it should i be concerned [ Disease ] there are a couple of possible explanations for this light spotting the most common one would be light breakthrough bleeding due to the hormones in your birth control pill bcp with prolonged bcp use the lining of the uterus can become thinner this can make it easier for spotting to occur often such spotting will present after intercourse or even heavy exercise typically it does not develop into a full on period like bleed other reasons for spotting after sex can include problems with the face of your cervix for example if you have a new infection with chlamydia that can make the cervix friable easier to bleed when touched by fingers penis etc if you had a polyp in the cervical canal the polyp tissue is very fragile and bleeds easily  my best guess is bcp caused spotting if the spotting persists or you have risks for chlamydia e g new partner or multiple partners you should see your gyn of clinic for follow up if the bcp is the culprit for the poor cycle control a change in bcp formula or brand can be helpful