I’m pregnant!

So unplanned but I’m still excited for the blessing. I just have this horrible feeling that something is wrong. I just found out yesterday and based off the last time we had sex and my last period, I speculate I am 2-3 weeks pregnant.

Is it normal to have brown or pinkish discharge so early on? I would be starting my period this week so I assumed that’s what was happening but I didn’t have any type of flow like I normally would. I’m also having mild cramps...

Advice please, I do have my first prenatal appointment August 24th.