Lennart presents some very valid points for using aids. Are you using a center mount snorkel? If not you get one. When I first started using one for drills there was a learning curve. My breathing pattern is in through the snorkel and out through the nose, Only when I get water in the snorkel do I exhale forcefully through the mouth to blow the water out. Balance is key, if you just let your head hang and the water support it you should be okay. Another reason for taking in water is not maintaining good steady head spine alignment. Moving the by rotation or side to side puts the inlet closer to the surface of the water.
Stick with it and remember it is only a tool.
Swim Silent and Be Well