I did nothing last time (except take a few OPK tests, all of which came up negative). My periods were as regular as you could get and I knew what day they were supposed to come so I didn't chart. It took us five months to get pregnant (not complaining, just giving info).
This time around however, I am breastfeeding, and my periods have not gone back to being regular yet (I have had two postpartum periods, and the second one was 6 days late according to the first one, which started on the 12th of December, which is when my periods came before I got pregnant).
I expect it to take us a bit longer to get pregnant this time around since I am breastfeeding and irregular, so we are trying right now (I'd be perfectly fine if we got pregnant next month though, so it's not like I'm unprepared if I do happen to get pregnant sooner than we think).
As to answer your question (finally lol), I do not plan to start temping or charting unless something goes wrong or haywire, but even before I'd start temping or charting, I'd call my doctor first, to see what's up, but I won't do that until I've completely stopped breastfeeding.
I also chart my periods like you (flow, how many days, and symptoms) and also when I have intercourse just on my MyCycle phone app. I'm only doing it so I can remember what day I actually got my period last, so I'd have a close date to tell my doctor if I get pregnant when I'm still irregular.
Good luck to you OP!
ETA: I just thought I would add, that my "method" of trying harder to get pregnant last time was just HIO....It will most likely be our "method" this time around as well.