Is this sciatica ?

I had a spinal fusion several years ago thats given me many problems the last 3-4 years, so i’m no stranger to back pain, nerve pain, etc. I’ve had crippling flare ups of pain in my back, pain that radiates into my hips and down my legs, loss of feeling in my legs, etc. But i’m not super certain what this is, because i havent felt this before.

I’m 29w4, and on and off all day today i’ve had this weird sensation in my right leg. It’ll come on out of nowhere, it’s not a sharp shooting pain like i’m used to with nerve pain flare ups. It feels like when you work out really hard and your muscles are burning and tired, but it’s very abrupt and it’s over my entire right leg. It only lasts a minute or two, and then i get a rushing feeling over my leg as it goes away. Like when your leg has been asleep and the blood flow finally comes back, that type of sensation. It’s happened the most when i’ve been up walking around, so it’s not that my leg is asleep, but it doesnt feel like any pain i’ve felt before or anything like i was expecting sciatica to feel like.