Hi _Nell. I always had really heavy periods when I was younger and so was put on a pill to try and control it - I'm sure this is what has caused my problems but no one explains that it may result in difficulties in later life.
That's ditto me exactly!
Yes my pregnancy was a result of IVF, you might surprise yourselves at how well you cope as a couple should you need more than one cycle
Your lining thickness is more or less where mine is and tbh you should find the IVF drugs thicken your lining more than with the tamoxifem - 99% of people do, just some are unlucky like me.
If it's nhs I would take the hysteroscopy (especially if all you've had is a HSG and ultrasounds) you want to know everything looks great before you do IVF really. I had one and was in and out in a few hours.
Re: food or herbal products you will find zillions of reccomendations on websites and forums suggesting products that help but honestly there are none with proof that are supported my published scientific trials. In terms of herbs you don't really want to take anything that would mess with the IVF meds so i'd steer clear.
But if an alternative to IVF then a TCM practioner will concoct you up a lovely bag of fresh herbs to make into a tea (these allegedly work better than pills and taste vile! been there done that

)
Food wise, there are suggestions that avoiding sugar, so sweet foods, alcohol, fizzy drinks etc can help.
It doesn't mean your odds are bleak though with 6.8mm, it's easy to think that when you read posts of women with 10's and 13's. The important thing in IVF for success is it's trilaminar or triple stripe in appearance (i'm sure yours is or your Dr would have said). Under 6mm has very little chance of pg, over 8mm is optimal so 6 - 8mm is still good odds.
Also, try not to get hung up on the 0.8mm (not that you have but I did!) , 6.8mm is another sonographers 7.2 IYSWIM as the measuring is tiny!
I was scanned twice in one day (the cycle that worked) by 2 clinics and they were a whole 1.2mm difference, which seems a big deal when I was worrying about 5.8mm v's 7mm!