Lower back ache - 4 weeks 4 days

Hi ladies.. some advice I really need. found out I was pregnant 5 days ago and yesterday and today have had lower back pain - the pain is similar to if you lay on your back in bed all night and you have that achey feeling.. or if you have bent down to pick something up and you stretched the bottom of your back. the pain comes and goes. I've got no bleeding or discharge. no abdominal cramping... my main fear is... is this an impending miscarriage which will occur in the next few days. has anyone else experienced this? 💛💛