Positive OPK finally! Timing BD?

[TwoTiels]

Hello everyone. This is our third month TTC. I've been charting for four months to learn about my cycle (SO HELPFUL!) My cycles range from 28-37 days and so ovulation can be unpredictable. I bought the Wondfo OPK's and the Clearblue digital to 'back it up' in case I got a positive. Today, CD 18 @ 6:30 PM I got what looked to be a positive Wondfo and the Clearblue smiled for me.
I wasn't able to test yesterday as I was having a Sunday funday and out all day with a friend. CD 16 was negative.
Last BD'd yest morning.
My questions: Have sex tonight til when?
Should I check again for a positive tmrw?

Thanks!

 

[littlelily]

Yes be tonight and tmrw

 

[MrsKChicago]

Tonight and tomorrow if you can. The egg should stick around for a day or so. Generally, it's better to have sex every day or every other day for a few days leading up to ovulation, but if ovulation isn't always the same, that can be hard to predict.