Early braxton hicks? Advice please

💙Shadoe✨ • Just conceived our rainbow baby:) M/C in March 14 & chemical November 14... Going to marry the man of my dreams<3 After 14 months of trying finally got our BFP 8/7/15! Praying for a sticky baby🚼

I am 20 weeks 3 days along. Today for the first time out of no where i got real nauseous, had a hot flash, and my stomach started feeling crampy an hurt... This lasted for about 3 mins. After i was fine just still a little nauseous. I did feel little guy move around and change positions after

Is this the start of braxton hicks? Or something i should be worried about?