I am 25 weeks pregnant and I am getting a tightning cramping pain in my lower abdominal and also right side of my lower back has pressure.?

Need to see ob. This is not a question you should be asking here you should call your OB doctor and be seen bladder inections are very common and can induce labor. Please get checked soon.
Pains. If you are having cramping that does not resolve with rest and hydration, go see your doctor. This could be a sign of a possible preterm labor.