Is It OCD? and Overcoming Obsessive Behaviors - Psychiatry

Is it obsessive-compulsive disorder (OCD)? How can it be resolved?

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Two years ago, a family member was hospitalized, and due to their weakened immune system, we had to maintain a very clean environment.
This made me more concerned about another family member's athlete's foot, so I began to feel that anything they touched was dirty.
I would clean surfaces they came into contact with at least twice before touching them myself.
Even if they walked on the floor wearing slippers, I still felt it was dirty.
As a result, whenever I walked on floors outside my own room, I would wash my feet before entering my room, which I did frequently—about 80 to 90 percent of the time.
Later, I noticed that others did not share this concern, and when they touched surfaces that had been walked on, I began to feel those areas were dirty too.
If I accidentally touched something, I would feel a bit upset.
I felt compelled to wash my feet before entering my room or before eating, as I couldn't accept the possibility that my bed might be dirty.
I would want to clean my room thoroughly, but I didn't mind having a laundry basket in my room; I would just avoid it.
If my body accidentally brushed against it, I felt the need to wash again.
Recently, I even started to care about the washing machine, which I previously ignored, because it is shared with family members.
However, when they do laundry or hang clothes, they often do other things around the house first, making me feel that the surfaces of the washing machine, including the buttons and handles, are dirty and need to be wiped down.
Almost every time I do laundry, I have to clean it.
Sometimes, if I accidentally touch a spot that hasn't been cleaned, I feel the need to rewash that piece of clothing.
If that clothing touches others, those also need to be rewashed.
As a result, I often end up washing ten pieces of clothing but only drying seven, with the others needing to be rewashed, which is very frustrating.
I have tried not to wash and to ignore these feelings, but I find myself thinking about it all afternoon and evening, ultimately leading me to rewash the clothes.
Additionally, I feel that when family members walk past my freshly dried clothes, they might dirty them, prompting me to rewash those clothes, which leads to an endless cycle of laundry.
I also check multiple times to ensure the door is locked after I lock it, and I do the same with the gas, refrigerator door, and motorcycle handle.
However, if I am nearby, I don't mind as much.
If I step out briefly to buy something, I don't frequently check if the motorcycle handle is locked; I can lock the door, turn off the gas, close the refrigerator door, and lock the handle normally.
But once I plan to leave or rest upstairs for an extended period, these concerns arise.
Could this be obsessive-compulsive disorder (OCD)? Can I overcome it on my own? I feel like these issues didn't bother me before, so why am I so concerned now? I think I shouldn't care about these things, but if they remain unresolved, I can't stop thinking about them.
Thank you for your help, doctor!

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L, 20~29 year old female. Ask Date: 2019/05/13