Formula to help with spitting up?

B • 4 kiddos. Newest edition: baby girl born 2/2016
My daughter is 7 weeks old and has been on Enfamil gentlease since she was 3 weeks.  Before that, she was EBF.  I think she spits up too much and I'm wondering if there's a better formula for her.  I try to keep her upright during and after feeding for a while, but it seems like as soon as I put her on her back or even lift her up sometimes, she spits up.  I'm wondering if it could have reflux bc it seems like she regurgitates formula and chokes on it a little bit even an hour or two after she eats.  She's generally a happy baby and doesn't seem uncomfortable all the time or anything like that.  She's got her 2 month appt next week so I'll bring it up.  Just wondering what you all think?