Yep, it's gona get hard of course. I can tell you that for sure because when I was pregnant with my 2nd child, i made the wrong choice to take too many classes and failed two of them. So i don't recomend u taking more than 12 units no matter your situation at hand. You neva know what kind of situation you could be in when you're expecting, so stick with one child for now and finish your education first bfore you think about having anymore kids.It's like my mom told me, \"u only have room to do one thing, either have kids or go to school only.\" Too much of anything can lead to stress or even depression.Good Luck!