Thanks for using HCM.
Please do not worry it is not a major issue.
In the normal menstrual cycle, various hormones act at different time of the cycle. some hormones cause any secretions in the cervix
to become thin and some cause it to thin. Hence on some days you will notice a thick discharge and on some [especially when you are likely to ovulate] a thin discharge.
You need not worry for this. However if the discharge becomes excessive, or has a bad smell, or streaks of blood then you need to see your gynec.
Regarding the period, minor fluctuations in the duration of the menstrual cycle must not worry you. Wait and watch for next few cycles if they are still variable then you will need evaluation.
Hope that this satisfies your query. Feel free to ask more when needed.
Thanks and enjoy!