Worried Mom! Please help.

My son is 1.5 month old. He still has jaundice. I'm showing him in sunlight for few minutes everyday since his birth. Not sure why he still has it. Paed doesn't seems to be worried.

And he has loose stools since one week after birth like he literally passes watery stools almost every few minutes. Doc said that it looks like lactose intolerance since the area where the stools passes is so red and wounded. I'm ebf.

My LO is suffering from cold. His nose is blocked at times. I'm using saline drops though. But his weight gain is good. He weighs nearly 5Kgs now. So paed said there is nothing to worry. But I couldn't see my LO being through all these when he's too little. I'm so upset and I just want to cry. I want him to be healthy and happy baby. Paed prescribed him Z&D dry powder solution and Oflomac. Since then my baby refuses to feed for more than five minutes and often cries and doesn't sleeps much which is very strange. I'm not sure whether it's because of these medicines. I'm constantly worried. Have an appointment with paed next week. Anybody else has gone through this?