Help, Thoughts?

The hubs and I have been trying for almost 5 months now to conceive. However, I've taken a few tests lately and each one has been a BFN. The most recent being this past sat morning.  But my body feels different. My boobs have hurts for almost 2.5 weeks. My lower back was bothering me today(which is doesn't usually, I've had random headaches, I'm nauseous whenever I eat anything, and my last cycle was march 29th😵. Maybe I need a better test??