need some insights from anyone willing to help

Nicole
So i have been trying to conceive for about 4.5 years, i have a 6 year old already. We have had 2 miscarriages along the way. I do have PCOS but that has never effected my abilty to conceive before. I do take provera to start my period and just finished my period. According to glow im fertile starting the 16th and biggest day is the 20th. So im looking for some opinions on ways to help me conceive this month, anything special i could use? Or anything i could do? A special position or anything? 
Also wondering how to check my cervical position and what that means based on its position? As well as temp checking, is there a certain thermometer and what do i look for in the way of temp? Ive never done either nefore.
I do intend to use ovulation tests but when should i start them? 
Thank you in advance to anyone helping out