Period(s) out of control!!

Rachel
Usually my periods are pretty regular, but lately they've been out of control! So I got my period at the regular time in July, then I got a second one the last week of July, then I got another one the first week of August! Though that one I'm fairly sure happened because I took plan b. Then I just started another one yesterday! I talked to my doctor about it when I had an appointment August 18 and they didn't seem concerned at all. What does this mean? Could I be pregnant? I took a pregnancy test a week ago that said negative, but with all of this going on I'm just not sure anymore. Could it just be stress levels? I'm sorry, there are so many questions in this 😂