Feeling heavy

For the pass few days, I've been having this heaviness feeling on my chest which required me to purposely taking deep breaths to get rid of this feeling. Have I forgotten how to breath properly?
I recently found a Shiatsu place by work and decided give it a try. My regular Tui-na lady broke her arm so it'll be a while before she's able to work with her hands. I was expecting a Japanese lady for the Shiatsu but she turned out to be Chinese. I told her areas of my aches and pains and she asked if I wanted traditional Shiatsu or Chinese ba-guan mixed with massage. Ba-guan is a technique using suction cups on are of pain and promote circulations. I decided to go with ba-guan because I've had success with that before. She told me that her technique is really call fei-guan (flying cups) because she used light levels of vacuum and flies over the back quickly. Fei-guan felt pretty good. On the lower back area where I felt sore, she left the cups there a little longer. During the massage sessions, she asked me to practice deep breathing. She'll pushes harder on my back as I exhale and she asked me to extend my exhalation as long as possible. It felt as if I was practicing yoga breathing while she's working on my muscles. When I forgot to breath, she'll breath loudly as a reminder so I worked hard breathing while she worked on my back.
She felt too much tension on my shoulder and her advice was to relax and rest.