My period is always regular, this month its not. i should have started my period this thursday but monday i started having brown discharge that lasted for a whole day then it started to turn into light pink blood, when i put a tampon in the bleeding stops

Hello. : Hello. I can't tell you if you are pregnant. If i understand correctly, your period started three days early and you had some brown discharge and then pink blood but the flow is very light. I am assuming that you are concerned because you have had unprotected sex. There can be some light cramping and spotting when an embryo implants into the uterine wall. What looks brown can sometimes be blood and sometimes what looks pink, can be a small amount of blood mixed in with other vaginal secretions. You may be experiencing your period or it could be implantation spotting. Symptoms of pregnancy can include a lack of a period, breast tenderness and swelling, nausea, vomiting, feeling tired, urinating more often, insomnia, feeling emotional, passing gas, etc. These symptoms normally do not start until you have actually missed your period. You can do a routine urine pregnancy test at the time you miss your period. I hope this is helpful.