Conceiving. HELP?!!

I am just about to give up. It's been almost 4-5 months & still haven't conceived yet.. For the last month or two I haven't been thinking about a baby!! So idk. Me & my fiancé are just gonna give up. Any ideas? Something to help?!Pleaseeeee. Also these tell me my fertile week but their both different. So idk. Help please :(