Progesterone and spotting after FET

Hi Ya'll!
First I have to say thank you for all the support received while I was in my 2week wait! The good news: we had our beta done and it confirmed we are pregnant! I am about  5w4d 😊 the scary part: we went in for our first ultrasound at the beginning of the week and things looks 'awesome' according to doc. But since I have been spotting 😁 
I was on progesterone inserts so they switched me to injections yesterday. Has anyone else had spotting after a successful beta? I am trying not to think the worst but it's hard not to let your mind go to that place when you see spotting😞