Has anyone tried this multivitamins for conceiving / getting pregnant?

No I have not tried that supplements. Basically, I prepared my body about 3-6 months ahead by adjusting my lifestyle and my consumption of food. Eg. Cutting down and avoid consumption on high sodium, oily, sugary food, no process food, no Bubble tea, wean off caffeine, walk and move about more daily etc. I started consuming folic acid seriously when we started to try for baby or when you missed your period. For 1st pregnancy, we did a fertility check as we tried over 8months but no result. Realised the more you are trying to conceive it seems harder to get pregnant. For my 2nd pregnancy, it just happened naturally as we were starting to try. Perhaps, you can try adjusting your lifestyle and watch what you eat and go for holiday to relax. I conceive naturally 2 months after coming back from holidays.