Recently I recovered from Covid, but I still have a mild stomach infection, I pass stool mostly 2 times a days sometimes 3, the stool is a little watery and loose in nature and black in colour, however, it's not too watery and doesn't have mucus, I don't have stomach aches of crams, I don't feel dehydrated as well but the colour of my stool my bothering me, what could it be and what doctor should I see? It's been almost 15 days since I have this issue.