This isn't necessarily the same as the question ban described in that MSO question or this MSE FAQ. It could be a shorter rolling rate limit. On the plus side, it's definitely not a manually moderator-imposed suspension, as evidenced by your being able to post here. I believe only moderators can determine for certain the specific type of automated block.
I checked the vote split on your questions and found that a few of them have a single downvote each (though balanced by an upvote), so the community's reactions have been mixed. Additionally, as noted in the comments, you do have a handful of deleted questions, which though easy to forget about, do count against you.
Questions are resources that can be depleted. I'd suggest going over that one big FAQ about quality-induced bans. Most importantly, polish up your existing questions where possible. Even while you're under a question block, you can still contribute by answering questions.
Another relevant MSE: The Complete Rate-Limiting Guide.