Welcome to HCM,
Your symptoms related to burning during micturation and pain and urge to urinate again and again indicate possibility of UTI, in infection sometime blood may come but if it is near period time it may come from genital tract.
You should get your Complete Blood Count
, with urine R&M and culture and sensitivity test and if there is infection a suitable antibiotic course will solve your problem .
In the mean time keep good hygine and take plenty of fluids,which will flush urinary tract
For your irregular period you can consult a Gynecologist and get a ultrsonography which will let us know ant pathology with uterus
and also if there are any kidney stones or any kind of mass or cyst.
If you have fever take paracetamol
to get some relief and see your doctor as soon as possible.