When i was pregnant i would spit up blood, now 9months after i get it sometimes, i have had my nose, tummy, lungs and mouth checked what could it be?

Dry mouth and nose : You are probably very dry. When the mucosa of the nose or throat gets too dry it will bleed and you will get some streaky blood when you cough or blow your nose. Try using ayr night gel in the nose before you go to bed. You can also use Bacitracin or any other ointment 4 to 5 times a day and that will help moisten the nose. Put a humidifier in you bedroom at night. Good luck.