30 weeks regnant and very sore- is this normal?

So i am now 30 weeks pregnant and in the past week or so i have been getting aches all over my belly/ lower back/ bottom and even a dull ache with a few sharp shooting pains in my vagina (sorry TMI) has anyone experienced this or know what its from... i dont remember having this with my first pregnancy and im worried i may be over doing things- i am also getting Braxton hicks contractions a few times a day at least....