lower back pain and feel need the loo all the time - normal?

[littlebylittle]

This is third time for me but I have an element of early pregnancy amnesia! I feel worried because I have lower back pains and it feels as if need the loo all the time (bowels - sorry tmi). Had two miscarriages before ds (second child) and can't remember whether real, honest to god AF symptoms are normal with a very early pg (af was due on tue so only four weeks) or whether I just got the stretching feeling. No bleeding and feel nauseous and tired.

In the first trimester I felt like I had period pain all the time - that feeling that your womb is being pulled out through the small of your back. I also felt like I needed the loo a lot but I also had swine flu so it might just have been the after-effects of that :S