Hello justangel - Welcome.
I would say the feedback Desirousofchange has given is what has worked best for me as someone that realized - all is not well as a JW - much later in my life. I grew up and progressed in "the truth" almost exactly as you did - baptism at 17, pioneering, bethel for quite a few years, MS, Elder. I am PIMO now for many complicated reasons. My thoughts:
Relationships: You may have to be fake so that you don't cause a rift with everyone you know. Especially your parents or any other family that are PIMI. It is okay to do that and you may want to explore what it means to "fade" as a witness. My experience is that there are many in the local congregation that are PIMO and starting to connect with those for social interaction could be helpful during this time. As I have faded, I have found many good social connections in the cong. that are good to be with socially but have no concern about how much you go out in service, comment, attend meetings, etc. My social life as a witness has improved as I have faded. Of course that means I am less connected to elders, MS, pioneers and that is fine with me.
Fading: Fading is probably the most important thing I have learned here. Fading to me is simply continuing over time to reduce what you do as a witness - comment less, study less or not at al, field service less, stop pioneering for a good reason (such as stress), attend fewer meetings and so on. There is an art to doing this...but it can be the most important thing you do so as to not "rock the boat" too much with friends/family.
Education: Take advantage of as much of it as you can get with your parents help. It is like an insurance policy or financial investment that will pay off dividends many times over what you are spending on it now.
Counseling/Therapy: If your mom is supportive of you getting help for anxiety, stress or other feelings you struggle with I would say to 1000% definitely look into it. I have gone to counselors or therapists before and I look back on it as some of the best decisions I have ever made. Think of it as getting a sports coach or investment company to help you with making important decisions when pursuing a sports career or big financial decision. Going to a counselor to help with this for 6-12 months could be great. If you do this, you MUST have the courage to be in the conversations without your mom or anyone else present. And be adamant that you want to have the sessions on your own. Of course mom and dad can pay for this which is what any loving parent would do for their daughter that they want to excel as a person.
Happy to share more, but those are some thoughts on specific items you mention.