I first heard of spd years ago when my daughter (14) who has cerebral palsy had many traits of being hypo sensitive.
She is now doing quite well and has gone to different forms of therapy for most of her life.

Now in a complete turn of events I believe I have spd as well. Although mine is on the other side of the spectrum- hypersensative. Having a child with special needs has always caused me to ignore many of my own issues. So here I am acknowledging them for the first time...

I seem to get horrible anxiety over strange things like clothes not fitting a certain way. I can't touch certain things like sponges (ugh, even typing it makes me uncomfortable) I feel like I want to scream (and sometimes do) over any repetitive noise- eating, breathing, dogs tail hitting the wall.
Any strong smell gives me an instant headache. I feel actual hatred for people who wear strong perfume.
I am always cold- I live in fl but even a slight breeze outside gives me goosebumps and makes me very uncomfortable.
I seem to have to lowest pain tolerance imaginable and suffer from chronic headaches.
I have very low energy levels and tend to drink a lot of caffeine. Although many times the caffeine can have a negative effect and overstimulate me so much that I feel like in cant move.
I over think EVERYthing. Which makes me shyer than I would like too be. I get very bothered by being wrong. I don't know if that is part of it, but always felt like I am that way because I am very intuitive to how others are thinking. When I believe someone is thinking negatively of me it makes me extremely uncomfortable.

Well.... All of these things have given me anxiety that seems to be getting worse as i get older and my career becomes more stressful.
I feel silly calling an OT. Isn't that for kids? All I know is living in my skin is often intolerable and, i assume, my family is starting to feel the same way about living with me. I am well aware that my issues are difficult for others to deal with.
Advice?

Welcome! OT is not just for kids. It's a great opportunity for you to learn to cope with your symptoms. It's a step in the right direction to care for yourself, and your family will benefit as a result. I encourage you to look into it.

OT isn't just for kids at all. I first went to an OT when I was 23? Maybe 22. I don't remember. Either way OT has helped me a lot.