advice please!!

In my first trimester my hormones were all over the place and something happened to my ph balance and weird smells started happening "down there" I asked my doctor about it and he said it was totally normal. When I entered my 2nd trimester the smell had went away and now I'm 24 weeks and the smells back. Has anybody has this problem? I don't really have any weird discharge and I just got tested for a uti about a week ago. So I don't think it could be an infection. Should I ask to get tested for BV? Or is this normal?