I think this is a question that's difficult to answer without some more information, but since this is the Internet, I won't let that stop me!
It sounds like your DM is going with a low magic item frequency, which is obviously fine, but a bit odd given that the game is in the Forgotten Realms, which isn't a low-magic setting at all.
For me, the real question is how many sessions have you played to get where you are? In many ways the first three levels in 5E are "trainer levels," where you level up quickly and get all of your traditional class abilities. Since you're going on into 5th level, you've gotten though those levels a while ago so you are proper adventures, which to me means magic items are on the table.
I like to introduce an item about every other session, and try and limit the items to one per character per level at the most. I also like to tailor the items I give out so that they're relevant to the group: nothing says magic and wonder like something you're toting around with no interest in using.
The real advice I'd give is: talk to your DM. If the group feels progression is too slow or the magic items are coming too slowly, talk about it. There's little that's going to break the game if you're getting an item every other session or so. Of course the low item situation is likely something that's entirely intentional, but remember: you're all part of the game so having something that is fun for you as a player is just as important as your DM's desire to keep the game low in terms of gear.