Pregnancy symptom help and questions?

Well if you have a reg period they say u can ovulate 12-16 days b4 your next period is due .If this is so (which i know its different w everyone) it could be possible that you were ovulating on those days you say you were having light bleeding .I read that very light bleeding or light brown discharge can be a sign of ovulation.If you were ovulating and had the week b4 there is a chance u can get pregnant .As far as all the symptoms though i heard that it can be to soon to get all that bc that it takes till after implantation to start producing hcg hormone then after that you may start to get the symptoms .Not sure im not an expert.Good luck