Should I ask for a blood test??

So I started feeling EXACTLY like I did my last pregnancy in exactly the same timeframe. I started with brown discharge about 4 days ago and still have a little. I am constantly extremely bloated and uncomfortable and have lower back pain as well. Glow is predicting my period start on Thursday but usually it doesn’t start until the following week. I NEVER have any of these symptoms with my period but what do y’all think? Is the bleeding too long to be IB? Am I still testing too early? I have a drs apt in the morning, should I ask for a blood test?