My 10 week old daughter pes a lot of wind and sometimes struggles with it, is this normal?

My daughter is 10 weeks old, she was fed up until about 8 weeks and is now on formula bottles. From day one she has always ped a lot of wind and some days she will lay for ages just struggling about, straining and farting and she sometimes even cries out. Im a bit worried about this, is it normal? She is excellent at bringing wind up when i burp her, she sometimes even just burps as soon as i sit her up so i know that is not the issue, plus i always burp her a few times throughout the feed. She seems to be pooing normally, usually about one a day, sometimes two but now and again she can go 2 days without doing one. Any advise would be great!