What Are The Side Effects Of Lansoprazole?

hello im a 33year old male,for the past few weeks i have had this pressure on my stomach like ive been holding in my pee but when i go there's very little but the pressure is still there.this seems to be worse at night time like almost every hour.at the minute im taking lansoprazole for my hiatus hernia and im also on 40mg per day of fluoxtine.is my troubles connected to my medication.