Is this normal? Is it somehow recalibrating because I haven't played rapid in a long time?
Yes and yes.
New accounts and accounts that haven't played in a long time are considered to have unreliable ratings... but that's not entirely accurate... it's not as if there are only two types: accurate ratings and inaccurate, it's a continuum. The ratings of players who play every day are considered more accurate than the ratings of those who play every other day... if only by a little.
The more you played, the more accurate the system considered your rating, which is why your gains and losses became smaller and smaller. This is normal.
Mathematically it's quite accurate and efficient at getting people to the correct rating... it wasn't made by chess.com, it was made by an actual mathematician, so you know it's good 
If you had a bad day today, and if your rating would normally be over 1200, then that sucks, but if that's true then you'll quickly be over 1200 in the future. Just try to play when you're rested and willing to focus. That way your results will reflect your skill.
So I don't play much rapid (If I do, 10 min games) and I've played over 200 games in rapid. I decided to play today and the first game I resigned and my rating went up +153? I had a losing streak of a few games, the next game I lost and went down -47, then another and went down -37, -34, until I won and went up +30, then 20-something and then in the teens and single digits. Most of the games were against stronger opponents (50-80 points higher than me) and those first ones where I lost a ton of points they were all stronger. Usually the ratings don't go down as much if you lose against someone much stronger.
What's going on? Is this normal? Is it somehow recalibrating because I haven't played rapid in a long time?
It feels pretty bad that those first games against stronger opponents cost me so much, and then the later games weren't worth as much. My record over the day was 16-13, but my rating went down from 1209 to 1163.