I just done a course while pregnant. I struggled a bit with morning sickness and getting assignments done as i was real sick but spoke to my teacher and they were understanding. I have to repeat a few units this year but he has given me the option to do them from home if i want as the classes fall around the same time im due.
If its something you really want dont let pregnancy hold you back
You'll do fine. Just talk to your instructors ahead of time. Email them before hand if you are going to miss class due to prenatal visits to your obgyn and the semester will be fine.