Possible ADD Affecting Work

I currently work front desk in an office (my full time job), I plan people's vacations, and I work in a science museum very part time (love this job). I was recently told at my full time job that they're worried I'm not a good fit because I have a hard time getting tasks done by a deadline, I can't keep up with the pace, and I'm not good at multitasking. Personally I'm better when I can focus on one task at a time but I need this job so I am trying my best to keep up and improve.

I'm going as far as to see if I have something going on in my head that affects my work ability (possibly ADD). I was diagnosed with anxiety as a child but no treatment was ever pursued as my parents didn't want me on meds. Reading up on it now I also feel I may have had ADD since childhood, my parents have even said the doctor probably would have diagnosed me with it had they looked more into it in my childhood but again didn't want me medicated. I have trouble staying on task, my mind wanders often, I'm constantly late to places when I shouldn't be, I get impatient in conversation and just bust into it, and when I try to listen to someone my mind drifts as well after a period of time.

I'm not really sure what to do. Is this job workable given I find out what's wrong with me, is something else more suitable? I am trying my best to keep up at work.
I'm not really sure what to do or where to turn. My husband of course is stressed and long story short won't be able to deal with the situation if I lose my job. I just needed to type this out somewhere and maybe get some guidance. I'm sorry that was long!

I would be persistent with your doctor about being evaluated for ADHD or ADD. I was missed as a child with ADHD and only got diagnosed 10 months ago. I am now 57. So it is never too late to find what is wrong and there are options for you. You have to be persistent if the condition was missed in childhood. I found that out. I would get a doctor who will listen to your problems and be ready to explain your problems in school when you were younger as ADHD starts in childhood as you stated. Hope that this helps and good luck.

Thanks, I am scheduled for a psych eval coming up to possibly try meds and therapy to help with my issues. Unfortunately, I was let go from my job yesterday because I wasn't a good fit and I wasn't able to keep up .

I feel better then I did yesterday, but I feel like a failure and I'm not sure what type of job would be best for me now.

Get a proper accessment. Its very important to know if you have ADHD.

If your problems are life long and not caused by symptoms of depression or anxiety by themselves, well you do sound like you may have ADHD. Its worth getting a professional assessment to know for sure because medication is often profoundly helpful and if your problem is something else, its also important to get it diagnosed.

I'm really sorry you let go, who knows, maybe it'll eventually be for the best. There are a bunch of websites myer-briggs is one that comes to mind that help determine what kind of occupation would best suit you. I'll see if I can come up with anymore.
I would definitely get evaluated. You're symptoms could definitely do ADD or depression or something else entirely. I think a psych eval will be really helpful in addition to therapy.
Good luck. I hope things improve for you.

p.s. you're not a failure, you just were at a position that wasn't optimally suited for you