Should I have Dips?

Amanda • I`m 24 literally married my best friend of almost 10 years May 9th 2015. He has 2 boys 6 and 2 we have been TTC our first baby since March2015. I thought this would be easy as pie, ha I sure was wrong
First month testing bbt. A lot of charts I see have dips and fluctuating numbers. Is this not a good sign for me?