It can take a couple of months to get a regular cycle again. It wouldn't hurt taking another test, although I would leave it at least a week. You may miss a period or two or have irregular bleeding although for some people they get straight back into a normal cycle. As for conceiving, there really is no way of telling, but the majority will conceive within the first year. It could happen straight away or it could take a few months. I wish you all the best and try not to get stressed out or too disappointed if it doesn't happen straight away. Good luck!
Is that a birth control pill?