online therapy is a thing! there are sites and whatnot to professionally do it, and sometimes if you had a therapist just skyping works
also, it's all in how you tell your parents. play it down just enough, but not enough that they think you can manage. be like 'i really hope i don't have these problems, but a few people who have them have mentioned that i seem to as well, so maybe it would be a good idea to talk to a professional just to make sure i don't? that way it doesn't surprise us badly later'. if that would work on your parents, ykno
some of y'all might have to be more forward and hold to it, though. sometimes, parents see any sign of uncertainty as a reason to say no, so you have to keep pushing while being respectful. tell them that if it goes undiagnosed and treated, it could affect your school and job life, but that treatment can keep it from being a super big problem