Adderall when pregnant?

I’ve been taking adderall since 6th grade. I stopped about a month before conception, just by chance. I’ve been actively avoiding it since because I haven’t had a doctors appt to ask. Its categorized as a class C; so they can’t say it causes harm or doesn’t.

Has anyone else taken it?

If you say it’s unsafe, can you tell me why?

I’m just struggling hard with work, school and ADHD.

UPDATE:

My OB actually said it is safe for me to take. I also talked to a friend who is also an OB surgeon and she said I could take it. I will continue to ask other doctors opinions but if I do take it, I only plan on taking it as needed and in a half dose. I only expect to need it to get through finals and before major tests.