Help with chart!

Hello!

I am 12 dpo on cycle day 32...according to both glow and fertility friend my period is due on the 4th (my period is irregular so I’m not sure if that’s when it is actually due) I have been tracking my basal temperature the past few weeks and noticed a dip yesterday morning and then a rise again this morning

Should I keep looking to see if the temperature rises? Is it normal to have another dip like that? I know my ovulation date is correct because I tested positive opk on 1/19 and 1/20 and bad cramping on 1/20....I also had cramping and lower back pains on 1/30...my cm has been between a mixture of watery and milky (tmi it’s been wetter the last few days) I don’t know much about basal temperature and cm...since I don’t actually know if my period will come on the 4th when should I test? Any help would be greatly appreciated!