Not pregnant but period 3 months late

So I have the marina coil in about 2 and a half years now. I’ve always still had my monthly period although very irregular

I haven’t had my period for 3 months except for a tiny bit of spotting on the 5th of January but it was a once off and nothings come back since. I am not pregnant but I’m seriously fatigued and have ‘period symptoms’ on an off ie cramping etc. I have no idea why the long stretch without. Maybe stress?

I’m currently traveling China since December and won’t be home to Ireland until April to go to my doctor. Any tips on relieving the symptoms naturally