Worried of another Miscarriage!

Hillary

Back in June I had a miscarriage around 5 weeks. Last night I started having lower back pain and today we went on a 3 hour road trip and ive had more back pain but not consistent and also some round ligament pain. Another symptom I didn’t have with my two other kids is the dizziness. I get random dizzy spells, not enough to fall out or anything but enough to notice. Should I be worried ? I’m only 4 weeks and 1 day as of today.