Odd burning tight sensation in thigh?

I’m 16 weeks pregnant. Haven’t done any physical activity, nothing out of the usual & today a few hours ago I got a horrible burning tight sensation in the circled area of my thigh.

I have no idea why this is happening? It’s an annoying feeling, it doesn’t “hurt” per se but I don’t understand why this has been happening the past 4/5 hours?

It feels like my muscle is burning & pinching almost. In the entire circled area. There is no position I can put it in to make the feeling go away.