dr brown bottles ?

Sorry if this doesn't make sense I'm going on 0 sleep but my 10 day old started spitting up while I'm feeding him I'm wondering if it's because of the air he also has really bad gas it doesn't bother him that much but the problem is he likes the nipple part to be long but it has to have a small rim i use the medela bottles that came with my pump but I think there the cause for the spitting up during the feed the flow on the bottle is the slow flow so I know it's not drowning him when I feed would dr Browns be a good bottle to try I've tried avert, and latch bottles but he won't even try to drink outta them