I need some help ladies!

So I’ve been single for a few months now, my husband and I split in February but our marriage was over long long before that and our sex life was non existent for two years. Tonight I have a date with a really really lovely guy and the plan is to stay at his tonight. He knows I’m nervous and I know he won’t pressure me into doing anything, that’s not my concern, my concern is so silly. What the hell do I wear to bed?! I don’t want to bring cosy pjs because it’s damn hot at the moment plus if I do decide to do anything with him, frumpy is not a look I’m aiming for! Then again, I don’t want to wear anything provocative but can’t find anything in between! I’m also really nervous about the potential sex part, I haven’t had sex since before I gave birth... is it different? Help! Please 🙈 xx