FTM here. Gorgeous five week old baby boy. Breastfeeding was a disaster (he wasn’t gaining weight) but am keeping it up for him, more for comfort than anything else. Was advised to top up with formula. Am using Aptamil ready mixed. Have tried Mam and Tommee Tippee anti colic bottles. Sadly baby screams after every bottle feed, goes completely stiff. I’ve tried winding him during feed, after feed, for ages, feed him upright, tried different bottles but he just chugs all the bottles really quickly. Any advice! At wits end here. He’s also not gaining much weight despite having loads to eat. Desperation here.