3 Days Ago, This Sales Lady Spit While Talking Closely
Hello, I'm Dr. Branch, thanks for using 'Ask a Doctor'. The fact that saliva fell on your upper lip would not significantly increase your chances of getting COVID-19, since, if she had the virus, it would more likely be passed by small droplets in the air (so whether or not you had felt spit, the risk would be the same). So your overall risk of getting COVID-19 from this exposure would depend on how much COVID-19 is in your community, but in general, I would not consider this any more of a risk than being around others without a mask would be.
While I would recommend using a mask and practicing social distancing, as well as frequent hand-washing, since you don't know if this sales lady had the virus or not, I would not say that self-isolation is necessary at this point. If you do develop definite symptoms, such as cough, fever, or shortness of breath, I would encourage you to self-isolate and get tested at that time.
I hope that helps, please let me know if you have any other questions about that, and I would be glad to discuss it with you further.
Try not to be worried
Since the lady was working, she most likely did not have symptoms, which does decrease the chances that she had the virus.
I am not a psychologist, so I don't know how much I can help with your OCD. I would only try to reassure you that you don't need to worry about COVID-19 in your situation. Also, if you were infected, symptoms may take 14 days to show up, but usually, they come 4-5 days after exposure.
So if you haven't had clear symptoms at this point, that is another reason to believe you were not infected.
I hope you can get your mind off of this and enjoy life again.
I would try to do something you like to do that will also benefit you, such as exercise or a hobby you enjoy.
Please let me know if you have any other questions, I'd be glad to help any way I can.