Yes, and if you are anything like me they will continue. I started having cramps at 7 DPO and they are still coming. I got my BFP at 9 DPO also. Doc says it's totally normal. Good luck!!
Congratulations on the BFP!!! I'm on my 5th week and I have been dealing with cramping the past several days - also back pain. Basically there is a lot going on down there and tons of hormones coursing through your system, so cramping is going to happen. Just be sure to call your doctor if the cramping is accompanied by spotting or bleeding - not necessarily meaning anything bad happening, but that is when you want to check in to be sure.
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Re: Cramping
DS born 6/2013