shes a little more then 5 monthes, so she is a little more then 20 weeks, whats so hard to understand about that?
i found out i was pregnant about a month into my senior year, and had my daughter 3 weeks before graduation, i stayed in school (regular school, although we do have a specific school for pregnant girls here) and graduated on time, with no special treatment other then having a few extra excused absences, which many people get for many things (how my school worked was you get 7 absences in every class per semester after that you fail, but you can get an appeal if there are real reasons for missing more days)
i missed about 6 or 7 days total in the 2 semesters and then left when i was 38 weeks because i was having contractions and my counselor was worried about me going into labor at school
its doable and the school cant refuse you an education if its a public school, it wont be much of a distraction, especially after everyone gets use to it, once the initial shock wears off no one will even think twice
good luck
~alicia~