scared!!

I'm 7weeks and 1 day today and my husband and I had sex and there was blood on the towel we used to clean up and on the sheets. It wasn't solid red like normal blood. It was like a clear pink color. I'm really worried that we just made me miscarry. I know I'm only 7weeks but I'm already so attached to this little peanut inside me.  I have my first ultrasound on Thursday so hopefully everything is okay!!!! Plz keep us in your prayers!!!