I just got my tongue pierced today and had a few questions [please ppl with experience]

This actually varies from person to person. For example, my sister and I got our tongues pierced the same day. I sucked on ice for about 30 minutes before and an hour or more after, she only did for about 5 minutes before and after. I had almost no swelling, and was able to eat thin-crust pizza just a few hours later. She could only eat sherbert and cold liquids for almost a week. But I couldn't change mine for about 6 months and she changed hers in 3 weeks. My suggestion- stick to cold/frozen semi-solid or liquids until swelling and pain goes down. Shakes work great (the diet shakes or nutritional supplement shakes) because they have all the nutrition to help keep you healthy and they can be drunk in a nearly frozen state.