Blood in spit up of 8 month baby. Fall!

Hi,my baby is 8 months old and today i saw blood spots in his spit up 2 times.Since morning i gave him rava uttapam for breakfast and cerelac for lunch and rest breastfeeds.He recently recovered from measles yesterday only and before that he had fever and diarrhoea and his ped gave him azithromycin syrup for the same but that didn't suit him so he changed it to cefixime. Fever and diarrhoea both were cured 5 days back and them he got measles rashes. Now no rashes are seen nor any redness on his body. I'm not giving him any medicines just vit D drops and iron drops as prescribed by his paed and also homeopathic calcium tablets. I called his paed and he asked me to give him Jr.Lanzol half tablet for 4 days and motinorm drops .He said its normal but still i'm worried why there was blood drops in his spit up,it never happened before. Also he feel down yesterday morning from bed but he cried for few minutes and then he was fine and playing no bruise or anything. Can this happen becz of fall