hi I do not know if anyone can help me with this or not but I have a son when I got preg with him i…

hi I do not know if anyone can help me with this or not but I have a son when I got preg with him i missed my period he will be 4 this month a few days ago I had cramps for about 10 mins went to the bathroom did not start my period a hr later I had had like a brownish discharge that went on for about 5 mins because I went back to the bathroom and it stopped the next day i started to bleed that only lasted about a day or two the next day I had nothing had sex that night than the next day that afternoon i started to have a light pink discharge but only when I go to the bathroom no need to use a pad or anything no smell nothing i have called the doctors but have not got a call back so I was just wondering if this has happened to anyone else this has never happened before I don't know if i could be preg or if my period is messed up has anyone had this happened to them before