Hi and welcome! It is very possible you have SPD or aspects of it. It seems to be related to the autism spectrum and ADHD/ADD, with some genetic components to it.

I first learned about SPD when my older son was diagnosed 4 years ago. The more I read, the more I learned about myself. I love borrowing my sons' weighted blankets now and then. Very calming to have that heavy weight. Being in large groups (more than 8-10 people) is very overwhelming and draining on me. For every 3 hours or so in a big group, i need an hour of alone time to recharge. I seem to have mostly auditory issues, have a big problem hearing conversations when there is background noise, I have trouble learning or remembering anything if I've only heard the information, I need to see it written down to understand and remember it. I can't take phone messages very well at all. Things are too loud for me. I speak very softly, everyone asks me to speak up but then I feel like I'm shouting.

I have to go for now, more later!