Ever since Thursday July 19th, I've had that feeling you get when you're about to start your period. The one where you keep going to the bathroom to make you sure you have or haven't started yet. It's now Monday July 23, and still no period. Before that I can't remember when I had my last period. My last period was regular and then 2 weeks later I had another period which is not common for me, but it wasn't heavy and it only lasted two to three days. I'm getting worried and I keep looking up pregnancy symptoms. Yesterday out of no where my legs hurt really bad. The feeling you get the day after a really hard workout, but I didn't do anything irregular than I normally do. I feel like I've been smelling everything and I have thrown up twice last week. Separated by a few days. I feel emotional but that could be because of my period possibly coming. Idk what to do and I took a test three days ago but it said negative. Now I'm playing the waiting game. Somebody please help. ):

It could be best to try another test, or even take a trip to the doctors, only they can confirm definitely what is the cause of this :)