I think you really need to see your GP/doctor as it could be anything. Also I think it s very likely that you are tired because of all the blood you have been lousing. But in any case, consult with your doctor!
Get a pregancy test & if it's negative, then it could be a possible miscarriage, It's hard to say, but do the test to rule out pregancy
Might be a good idea to discuss this with you doctor/GP
Hope ur ok.
Rachel