Limonene
Not a huge fan of Limonene, which is a shame since it’s so prevalent. I’ve found that in high concentrations, it often causes my heart to race and can exacerbate any anxiety I have. If you find that you also have this problem, it can be helpful to try some strains that don’t have high Limonene levels, or at least have Limonene in a lower relative concentration to other terpenes, especially calming terpenes such as Beta-Caryophyllene, Myrcene, and Linalool. You’ve probably had a decent amount of this though, since it is certainly one of the most common. In general, it is a more head-high type of terpene.
UPDATE (4/15/24): When used in conjuction with other terpenes and in a way which can capitalize or benefit on the increased heart rate/blood flow, Limonene can be quite good. It’s a tool to be used when it is good, and not used when it is bad. For knowledge of that on a personal level, you can only know from observing your particular reactions. However, it is still recommended to avoid Limonene for those who commonly have a feeling like “anxiety” or “paranoia” from smoking weed.