TMI PIC-Spotting?!?

I'm 5wks 3 days along and have been experiencing cramping since about a week ago, feels more bathroom (gastro) related I believe but still not something I'm used to. I'm also nauseous as of yesterday. I don't have my first prenatal appointment until Sept. 30th. My husband and I had sex this morning (third time we've done it since finding out we're pregnant) but just now when I went to pee I had light spotting. I've heard this is normal after intercourse or in general during early pregnancy but I'm freaking out and the doctors office closed 10 minutes ago. Anyone else experience this?