Bad back pain

Alright guys, I’ll be 5 weeks tomorrow. I had light brown spotting for one day at 4 weeks 4 days. None since. But I’ve had bad lower back pain on my right side on and off for w while now. It has gotten to the point where it’s going down my leg. This is also in combination with some light cramping and chills/just generally feeling under the weather. HCG level was 471 on Tuesday, had blood taken today but won’t know those results until early next week. I am high risk due to recurrent recent miscarriage. Should I be concerned? If so, what should I do? I do not want to go to ER if it’s not needed.