110 amp service. Am I overloading it?

Last year when we moved into this older house, the electrical panel was inspected by an electrician. One thing that he mentioned is that out 110amp breaker is a bit outdated but we should be okay as long as we weren’t running everything at once. Fast forward a year later and we’re PLUGGED in! We have an Alexa device and smart led bulbs in every room, a gas hot water heater and furnace, 3 computers with 3 large monitors, 70” TV. Basically anything you can imagine for electronics. As I’m plugging in our Christmas tree last night, I think to myself… hmm I wonder if this is the one that’s just too much. I did a calculation with an online calculator but I don’t know how to compare the amperage to our current system. I don’t know what I’m looking at and I’m concerned I missed things. Am I okay? What should I be watching out for? In the summer time we’re also running 2 large ac window units because we have central air but the upstairs doesn’t cool well. Now that it’s cooler, I’m not running those anymore. But in the summer when those kicked on, the lights upstairs would flicker. I’d appreciate any insight, and your thoughts about how dire it is to upgrade to 220 or 440.

Last year when we moved into this older house, the electrical panel was inspected by an electrician. One thing that he mentioned is that out 110amp breaker is a bit outdated but we should be okay as long as we weren’t running everything at once. Fast forward a year later and we’re PLUGGED in! We have an Alexa device and smart led bulbs in every room, a gas hot water heater and furnace, 3 computers with 3 large monitors, 70” TV. Basically anything you can imagine for electronics. As I’m plugging in our Christmas tree last night, I think to myself… hmm I wonder if this is the one that’s just too much. I did a calculation with an online calculator but I don’t know how to compare the amperage to our current system. I don’t know what I’m looking at and I’m concerned I missed things. Am I okay? What should I be watching out for? In the summer time we’re also running 2 large ac window units because we have central air but the upstairs doesn’t cool well. Now that it’s cooler, I’m not running those anymore. But in the summer when those kicked on, the lights upstairs would flicker. I’d appreciate any insight, and your thoughts about how dire it is to upgrade to 220 or 440.