Help me out figure out the bus?

Hey! I just moved to Worcester and am having a lot of issues figuring out how the bus works here. I use both the tracker and Google maps to see bus times but there has been multiple times I’m at the bus stop only for the tracker to go from 3 minutes to 27 minutes or for Google maps to tell me the bus has already passed. I’m there the whole time sometimes waiting up to 30+ minutes for a bus that never comes. Is there something I’m missing here? Sorry if this seems dumb, I genuinely just want to know when and if a bus if going to come to my stop 😭