My 7 week old is exclusively breastfed. He is gaining very well and thriving, had no problems what so ever, which after giving up with my first child with latch problems I am very pleased about. But I just seem to get every infection going... Currently full of a cold, with a chesty cough and have 4 ulcers on my lower lip. Has anyone else noticed a weaker immune system with breastfeeding? Any tips on boosting it? X