Hi. I Have Been Having Every Single Pregnancy Symptom. This

Hi. I have been having every single pregnancy symptom. This isn't my first. I have a four year old. I'm not supposed to have my period for a week. I had some blood today in my underwear so when I went to the bathroom there was none in the toilet. I put in a tampon and there was none on it. What's going on. Could I still be pregnant.