Can you help?

Latiauna
I haven't had a period since June 6 2016 and I went to the ER to be checked out and I was given a negative result and was told I had a UTI... Yesterday I noticed brown discharge and just notice some a few minutes ago... Been having pelvic pressure, back aches, sore stomach and really gassy with tingling nipples.... Am I pregnant? Should I take another test?