There are a lot of mysteries in our brain.
Generally, it's OK to have bufferin (aspirin) with citalopram.
But in the case of you, you must be careful of having them together. It could raise the risk of bleeding.
"Serotonin reuptake inhibitors (SRIs) may potentiate the risk of bleeding in patients treated with ulcerogenic agents and agents that affect hemostasis such as anticoagulants, platelet inhibitors, thrombin inhibitors, thrombolytic agents, or agents that commonly cause thrombocytopenia"http://www.drugs.com/drug-interactions/aspirin-low-strength-with-citalopram-243-3197-679-0.html
Aspirin is an anticoagulant.
If you would like to pain killer, I reccommend Tylenol (acetaminophen).http://www.drugs.com/drug-interactions/citalopram-with-tylenol-679-0-11-12.html