So there's a guy I've been hanging out with... it's been a bit obvious that we like each other, and we finally spent the night together.
Now things are awkward... he used to call me more often... he still does but I feel he is backing off a little... though I think maybe I am being overly sensitive. I am not sure what my instincts are.

Any advice? Should I talk about it or be a bit more patient for a little longer, back off and see if he opens up to me?

Well, its happened to me before and I think you should just back off and let him have his space. Well, usually when a guy does that its becasuse something is usually bothering them. Family problems, maybe. Friend problems, most likely. Addicting habits, possibly. But, you have to let him get over it is that's bothering... let him have his space. Usually the longest reaction goes to a few weeks so if it goes too much longer, talk to him to see if he wants help. If he refuses your help then maybe you should reconsider him

I believe in nipping things in the bud.Why wait and worry when you may be just wasting your time on someone who is not into you?
Ask him where if anywhere he sees the relationship going.Anything else is pure speculation and that nearly always leads to misreading the situation.

I feel it may be too soon to discuss things, as it is all very new.
May be I'll go with backing off a bit, and if he contacts me at least then I'll know he's putting in some effort.

Thank you for all the helpful advice

Anytimed... and I'm glad you saw what I meant through my message... I know what I am talking about... nearly everyhting I help people with or answer for... has happened to me as well... so I hope things work out:)