no it is not an early sign of pregnancy
Brown discharge can indicate pregnancy, but it can also mean that you have a water infection. See your Doctor.
Missed period , cramping, tiredness, feeling or being sick.
Three days after sex would be too early for most pregnancy symptoms to begin (eg. sickness, dizziness) however brown discharge could be a sign of implantation (where the fertilised egg implants in the uterus lining). I suggest taking a pregnancy test in 3 weeks time
dizziness, vomiting, sensitivity in relation to food, temperate and laziness.
Yes very normal. In fact its a pregnancy symptom.
You have increased discharge and it's not unlike ovulation mucous, although that does vary
Tender breasts, tiredness, nausea, backaches, headaches, and darkening of nipples are early signs of pregnancy
Yes, for some women it can. It is worth talking to your midwife or doctor about it though, because it could be a sign of anaemia. Nausea and dizziness is quite common throughout pregnancy.
Could it possibly be a yeast infection?