I have been knitting a project where you knit one row and purl the next then repeat this until you reach the measurement you want. My problem is the bottom&the sides are rowing up on me. Is there a way to fix this.ty
That is called stockinette and stockinette curls. It’s the nature of the stitch and the only way to stop it is to have a border all the way around it. There is sticky thread at the top of this forum that addresses this. Have a look at that and see if it helps you. 
You’re knitting stockinette, and stockinette curls. There is an entire thread about curling stockinette, so you’re not alone.
However, if you are going to seam the edges, the curling won’t be a problem. What are you making?