Xine, you can doggy paddle if it suits you, it's just that front crawl done properly is the most efficient and fastest stroke if done properly. After watching hundreds of people swim, it's my opinion that the ladies are better at front crawl than the guys.
So just take your time and stick with it. My problem was holding my breath then frantically blowing all the air out ready to get another massive breath in. Then if I didn't get one in or hit a wave I would start panicking.
Buy a pull buoy and have a bash with that, seriously I forgot about that, that really helped me because it lifts your body to the correct position in the water. Allowing you to keep your arms moving and concentrate on your breathing, without flapping about using all your oxygen and energy. ( your local pool will lend you a pull bouy)
Really slow it down and try and breath every three strokes, that should give you plenty of time to get the air in. Don't try to hard to draw the air in, just a little at a time, try not to think about it to much. Relax as much as you can, it all go's to rat s**t if you start trying too hard or over think it.
If your relaxed and you miss your breath on your third stroke you should be able to pick it up on your next three without losing your rythem. (take a drink with you, keep hydrated).
I actually love swimming and running now, something I never thought would ever happen seriously. Just wish I was twenty years younger.. I swam last night and hope to get in the local open water this weekend. As soon as you crack that breathing lark you will be flying. Best wishes horse.