Do not worry, I think that is the most important advice to give.
I had 2 embies transfered on the Monday, then off work for 2 days but no bed rest. Sex was even encouraged (ok no dangling from the chandeliers

), so we did, enjoyed each other; did not think too much about the dreaded 2 weeks wait which was good after the long weeks of stim'.
Doing sport was ok as long as I didnt overdo it. I did rest when tired, had a lot of warm drinks like soup, tea (but the kind with no caffeine) and water, and always eat very sensibly and healthy, walked to keep energized for the 2 days at home. The first day back to work I was completely exhausted, because I could not rest when needed. I could not stand for more than 1 minute, even speaking was really hard, so I thought there is no way the embies are going to like this environment and manage to develop.
Result: BFP on the first try and we're now expecting twins
Conclusion: do as you feel (as long as you keep it sensible of course), you have deserved to indulge after this long road.
Good luck to you, I hope you get a BFP very soon!!!