PhD in Overthinking $25.00 I have a PhD in overthinking. If you do too, this shirt is for you. Shop › PhD in Overthinking style: Select style women's unisex Size: Select Size small medium large X large Add To Cart Added! I have a PhD in overthinking. If you do too, this shirt is for you. Also Available #ActuallyAutistic $28.00 Shoulder Shrug $25.00 Love That Journey $25.00 Who Needs a Drink? Tee $25.00 Hateration, Holleration $28.00