You should never feel you have to post. Posting for the sake of posting is bad, both for your health and account reputation as you'll just end up producing meh content.
Just take a break when you feel like it, no one is going to judge you for it
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That's how I kind of see it as I look back at some of my posting. I think the majority of it was good, but there were certainly posts that felt meh as I was writing, and later posting it. I never liked that feeling, but keeping the streak going was my main focus above all else.
Taking time with each one from here on out, even if it means posting infrequently, would be the better option.