Am I being stupid?!

Hi I'm 39 my husband is 26. I have 5 children already 4 from previous relationships. 22,18,13 and 9 and one with my husband who's 3. I have been off my implant now since 3rd April this year so not long really. I just feel sometimes I'm being silly that we are wanting another when some people are trying for their first! And am I mad wanting another lol?