Hi I haven't had a period since May 11 and I have a lot of discharge and negative pregnancy test but my breasts are sore and lower back hurts?

Missed periods. You may have taken pregnancy test too early. Repeat now to see if you are pregnant. Either way, call your doctor for a check up.
Hormonal imbalance. Menstrual irregularities: Menstrual irregularities are not uncommon and anovulatory cycle is a common cause. If you miss more than two periods it would be time to see your doctor. If you do not wish to be pregnant, use contraception all the time. You may consider implanted contraceptive or an IUD. Consult this site for more information on this topic. http://www.nichd.nih.gov/health/topics/menstruation/conditioninfo/Pages/causes.aspx Practice safe sex.

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I am 2 weeks late. I have a bloody discharge. A lot of bladder and lower back pain, but negative pregnancy test. I just started acne meds 3 weeks ago.

Take the test. If you want to know if you are pregnant, take a test. In today's world you do not need to wonder if you are pregnant or not based on symptoms. Pregnancy tests are available at any pharmacy and in minutes you will have your answer. They can detect a pregnancy 7-10 days after conception. The best time to take one is when you miss your period. Read more...