You can't fix it. Its your uterus expanding. You will feel period like cramps throughout your entire pregnancy. Your body is preparing to carry a baby. That's all. If you start bleeding, them that's a problem.
I am 6 weeks and am looking like I will carry this time so far. I have had one child and 2 miscarriages. If you aren't spotting and with rest and drinking a lot of water it goes away, you should be fine. Minor cramping and a fullness feeling is normal.
8weeks here I have it every so often. Unless your bleeding everything is fine.