What’s going on?

Mariah

So I was about a week late on my period and when it finally came, it wasn’t normal. It was super light, like pantyliner only when I’m a super kind of girl light. It was a consistent light flow for about three days and then one day of spotting. I thought it was over last night, then it came back again today. I’ve been thinking that I could possibly be pregnant, but I’ve taken a couple negative test and for some reason I really can’t get ahold of my doctor. (Every time I call they are either busy so I leave my message or I miss them when they leave.) I’m not sure what to do at the point, of course I’m still trying to get ahold of them. Has anyone had this problem before?