Hey!
Welcome to the forums, first off, and I hope we'll be seeing you around in furute! =)
Sex shouldn't have to be forgone during pregnancy at all... In fact, doctors actually recommend it to ease stress and level out hormones. A lot of people also believe that this will strengthen the relationship of the family when the baby is born.
Massage should be perfectly fine! It's not going to harm you or the baby unless he starts hammering into your belly! In fact, I'd say a nice sensual massage or a warm bath together (if you have a big enough tub) would be great to relax you and ease the strain on your muscles. Oral and finger play should also do you no harm, likewise with casual toy play. Obviously you don't want to be going crazy inside you with a 12 inch vibrator, though!
It's not recommended to use internal vibrators during pregnancy a lot of the time, however massagers are well and good, as should be cock rings and dildos. Be gentle with anything you do use, obviously. If something feels uncomfortable for you, you should probably trust your instincts!
As for sex and bondage, nothing's stopping you! Provided your partner is not giving you a "bruise me" pounding, this won't have any effect at all. He cannot hit or damage the baby just with his penis, suffice to say! Bondage, of course, is also fine, just make sure you're comfortable! Positions are the only real issue I think you may find! If you're still small enough, you can try cowgirl or reverse cowgirl, or even missionary. He could also quite easily take you gently from behind, or spooning is always a good idea. Keep to what feels okay for you, as you don't want to strain your body... And he doesn't have to tip-toe about it, just understand that you're a little more fragile than normal!
I recommend getting a lot of massaging in there while you have the chance! Massage candles, vibrating massagers and edible body paint could all be nice romantic fun while you're pregnant, and you could also stick to bondage and tickle-and-tease games! Even playing with ice cubes or talking dirty to eachother could be fun!
I hope you manage to find the spark through the next few months! It's good for you to keep your spirits up!
Take care! x