Chest pain

Hi there! I have been having chest pain in the left side of my chest. I only get the pain when I take a deep breath and it is like sharp almost cracking feeling. The pain sometimes goes into my left side of my back. If I’m up for too long the pain travels to my lower left side of the neck a little. The pain gets better when I lie down. I am a 23 year old female with only asthma. I have no shortness of breath or wheezing. I get dizzy a little bit but I am not sure if that is anxiety or not. Does anyone know what it could be before I determine to go to the doctor and have a huge medical bill ^_^!