Thanks for posting your query.
Unfortunately, it is difficult to say if these symptoms are serious or not, till a doctor examines you and orders some tests.
Pain in the lower back and hip is common in pregnancy
and not of any concern on its own. Chest pain
, can be due to trivial causes, like a muscle pull, which settles down quickly, or it may be something more serious, depending upon the type of pain, exact location and other features.
Nose bleeds again are in general common in pregnancy.
On balance, it would be better to see your doctor and get all this checked out.