Hi Stephanie,
I think that from all the stuff I've researched, raising up your butt after intercourse does not increase the chances for pregnancy. It is myth.
You can continue checking your basil temp every morning but don't rely on this alone. Usually when your temp is high, you have already ovulated so you would be too late for intercourse when TTC and relying on just the temp method.
You should be checking your Basil Temp, Cervical Mucas, & Cervical Position. There is a great book out there about charting and understanding your fertility. I'm reading it now and it is extremely helpful. It is called Taking Charge of your Fertility.
Hope I have helped you some....
Much luck and baby dust to you!