I agree with Heather. I think the average is at least 3 cycles of clomid before getting pregnant. You can ask for you husband to get tested as well if that will make you feel better as well. I know that I was refferred to a fertility specialist and I had to have all those tests done before he would prescribe the clomid to me.
I would for sure ask for the CD21 progestrone blood test though. It will help to determine if you did actually ovulate or if you need a higher dosage of the clomid for the next round.
It's always a good idea to have your husband checked, just in case the problem lies with him. However, if you haven't been ovulating normally, and you've only tried clomid for one month, you could always give it a few more cycles before starting additional testing. If you're not pregnant in a few months on clomid, I would ask your doctor for a referral to an RE (fertility specialist). He or she can do some simple tests initially (blood tests and monitoring of you; and a semen analysis for your husband) and suggest a possible treatment plan. Then down the line, additional tests, if necessary. But I would probably try clomid for a few more cycles first. Best of luck!
P.S. If you want to make sure you do in fact ovulate, you could ask your current doctor to come in for a progesterone blood test about a week after ovulation. You'd be looking for a number over 10 to indicate a good ovulation.