I've been smoking for 15 years... and have smoked some great tasty sweet weed and some very shitty crap, lots of different strains, etc... and it depends on what you're smoking and for how long.
Tolerance can be a bitch hahaha, but what can you expect! It's not that the weed is not good anymore, it's just that you've developed tolerance and it takes you more to get high.
You're in Canada, it's not hard to get very good weed here. I still don't get it when some friends get some very shitty weed, lots of stems and seeds, super dry... WTF.
Take a break and get a good source and enjoy.