My Husband And I Have Been Trying To Have A

My husband and I have been trying to have a baby, I think we may have conceived 5 days ago but is it to early to be feeling symptoms? I get my period between the 20-24 of e eryone month and I've had horrible cramps and my boobs hurt, and I felt sick this morning but didn't vomit, very similar to symptoms I get about a week before my period. Can I take a pregnancy test because I'm soo excited or is it just a waste of money to take one this early. People keeps saying wait to see if you get your period but I want to know sooner if at all possible!