I have been fighting allergy problems for the past two months, and since last week what was clear coming from my nose has turned green and sometimes contains blood. Is this something I should wait out, or see a doctor for?
I went to the doctor about a month ago and she didn't seem too concerned. Since going last month, my symptoms cleared up until last week.

By all means- definitely go see a doctor. A tinge of blood from the sinuses can just be due to dryness, however green drainage is not normal and should at least be looked at by a physician. If you have a sinus infection- it is important to get it treated as it can lead into many other problems.