Had a miscarriage in july havnt conceived since period always normal last one lasted couple days now i am experiencing light bleeding and pain on left?

Could be: You don't say when your last period was or if it was normal. From your question I assume you are having unprotected sex. This could all be associated with ovulation, you could have an ovarian cyst, this could be implantation, or you could even have a tubal pregnancy. To know for sure you need to see a doctor for more history, an exam, and appropriate testing. Hope this helps.