Is it worth taking a pregnancy test?????

Hi there I was wondering if you girls can help me. I was wondering if it was worth taking a pregnancy test. I have been having symptoms like nausea for weeks now and it's been nearly every day which is very unusual. I've been having cramps for weeks too which is also unusual. I've been sleeping a lot more than usual and I've had a few spots of blood too. Foods I love to eat make me sick now and when I fancy something to eat I cook it and when it's ready to eat I smell it it turns me off and I feel nauseous?