If you're feeling up to it, then GO FOR IT! There's no reason that I know of to wait until your 6 week check up - maybe someone else will know something specific - but I didn't wait for 6 weeks. Just something to keep in mind too is that all the baby hormones floating around make your vagina quite dry & tender so sex can be a little painful. I can remember being surprised at this as I'd had a c/s so asked the doctor about it at my check up.

Have fun hunny!