***Not in nhs but need urgent advice please***

My 2 year old has been having soft but still solid poo that is brown but also got really dark green or black spots going through it, should I be concerned?? Don’t know if it’s related or not but my mums just told me they’ve been giving him raw cows milk straight from the cow for a while now, done some unadvisable doctor googling and saw that raw cows milk isn’t good for children? I cannot get a doctors appointment for 2 weeks to speak to anyone so I’ve come here for help, any doctors willing to give advice please??