Age: 20 (soon to be 21)

Sex: F

Height: 170cm/5'7"

Weight: 60kg/132lbs

Race: I'm white

Duration of complaint: since my period started when I was 13

Any existing relevant medical issues: not that I know of

Current medications: none, including birth control (I'm not sexually active)

Hello r/AskDocs members! I'm wondering if the different durations of my cycle are normal or do they count as irregular? I'll include the dates duration of cycle from 2019 on:

2021

12.01.-16.01. 30 days

11.02.-15.02. 32 days

15.03.-19.03. 28 days

12.04.-16.04. currently cycle day 36

2020

04.01.-06.01. 18 days

22.01.-25.01. 28 days

19.02.-21.02. 33 days

24.03.-27.03. 28 days

21.04.-24.04. 30 days

21.05.-24.05. 25 days

15.06.-18.06. 25 days

10.07.-13.07. 28 days

07.08.-12.08. 25 days

01.09.-03.09. 40 days

11.10.-16.10. 34 days

14.11.-18.11. 27 days

11.12.-14.12. 32 days

2019

11.01.-15.01. 29 days

09.02.-13.02. 30 days

11.03.-16.03. 25 days

05.04.-09.04. 29 days

03.05.-08.05. 41 days

13.06.-17.06. 44 days

27.07.-31.07. 30 days

26.08.-30.08. 34 days

29.09.-03.10. 34 days

02.11.-06.11. 29 days

01.12.-04.12. 34 days

My periods tend to be painful on the 1st day, mostly only mild/moderate pain but sometimes I feel like I have to vomit from the pin (not very often luckily) and I have lesser (if any) pain on the 2nd day. The pain started a few years after my period started (unfortunately Im not exactly sure when). Also since ~1 or 2 years I've started to sometimes feel very mild period-like pain before my period starts (I do so right now).

Thank you for your help!