ssris can have a negative interaction with nsaids, but I don't think it's common. It's a possibility of bleeding. Tylenol might be the safest, but check with your psychiatrist.
I have taken aspirin while on SSRIs like Lexapro, but a great resource to ask is your pharmacist that fills your prescription for your medication. First, they are experts in what interacts with what you are taking (and it is there job!), and second, there advice is free...no need to make an appointment. And of course another great resource is your doctor.