Can 800 mg of ibuprofen cause a miscarriage at 5 weeks?

Ibuprofen is a non-steroidal anti-inflammatory drug (NSAID) that is used to treat pain and fever. It's use during pregnancy is not generally advised unless prescribed by your doctor. Instead acetaminophen is usually recommended to treat pain and fever during pregnancy.
It is not clear if taking ibuprofen early on in pregnancy can cause miscarriage. Some studies suggest that some women who have taken NSAIDs during pregnancy are more likely to have a miscarriage than those who have not. More studies are required.
https://www.drugs.com/pregnancy/ibuprofen.html