Boris, your marriage can absolutely survive. TTC is incredibly stressful for both sexes. Us girls are just desperate to get as many sperms up there as possible & the guys know that if they fail to produce the goods, we will lose our chance for the month. It is horrible and un-sexy.
I think the key is to have non TTC sex, even if you don't feel like it. I often find once we get started I get really into it. Also, as Purdie says, give him blow jobs, massages etc. It will reassure DH that you want him, not just a sperm donor!
Melon, I feel so sorry for you. I really hope you get either a BFP or AF soon. At least then you won't be in limbo.
Sparkly/Spinning, you are getting to the exciting end of the month! Fx for those Christmas babies!
Pixa, you are not out yet. I have my fingers crossed for you.
Purdie, I agree with the coffee suggestion. I only ever drink weak lattes, but they often make me need to go plop. If you have a strong black coffee, I reckon it would do the job.