10 Laps at the Aquatic Center

My swimming is getting faster, but I'm still having troubling with the timing of my breaths. My first lap was 1 minute 15 seconds, the fastest ever. The balance of the laps were between 1:30 and 1:40, still faster than usual, but I had to stop for at least a minute in between each 50 meters. I've been able to keep my head down and take breaths from the side, but I'm still doing something wrong - not sure what. I guess it's time for professional help!