I’m optimist that you’ll start noticing some changes within a few days of eating the yogurt and some of the pre/probiotic foods. Those foods will start giving your intestines some good bacteria again!

When you have time, do a little research for healthy foods to eat for repairing gut health. But try not to get too obsessed with it! Eat what you will enjoy and skip the weird foods that might not appeal to you. It won’t take long before you’re comfortable with the new food routines. They’ll become second nature.
After your stool starts becoming more formed you can add foods like nuts and berries, healthy salads, fruits, veggies to your daily intake. I think I mentioned avoiding dairy (except the yogurt) for few days until your stool is normal as well. I’d also suggest switching to lactose free milk products. For example, I drink Fairlife (fat free) milk. All the Fairlife products are lactose free. Other products on the market are Lactaid, which also makes lactose free ice-cream (which is to die for! 😅). They also make cottage cheese and sour cream. I didn’t have any luck at all with the Lactaid pills, (to take before eating dairy) they really bothered my stomach. But I’ve tried most all the lactose free dairy on the market. Another yummy cottage cheese is a brand called Good. They have a lactose free product in their lineup. That on has active yogurt cultures in it too.
My goodness…you have lost a lot of weight. I’m hoping you can gain some of that back soon. When your guts are healthy again, I can guarantee success in that department if you start eating some of that Lactaid Salted Caramel Ice Cream. 😂