Baby really uncomfortable Help!!!

[Laurenxoxo]

My 6 week old has been crying non stop the last few hours and I'm sure it's because she is constipated and needs to go to the toilet, we have tried moving her legs like a bike, holding her legs up and also gently rubbing her tummy.. we tried some gripe water and also infacol even though I know they are mainly for trapped wind. But it's just awful and upsetting seeing her in pain and so unsettled.. we are going to try a warm bath now too but does anyone know what else may help? Thanks