Hello sir my daughter just enter to 7th month. from last 3-4 days she is getting irritated and crying lot than normal days. she is not taking food. she is crying a lot at the time of feeding. although she cried earlier but took food but this time not interested to take. last 4-5 days she poop blackish not totally . she is taking iron syrup from last 15 days . please advise what's the reason why she is crying a lot and taking food