period ttc or other

I had my period from April the 14 to the 18th. Well this last Tuesday and Wednesday I had a little bit of spotting. (Trying not to read into it too much). My husband and I have been trying to concieve since September of last year after taking the iud out. And today my pelvis and my lower stomach and and back have been hurting on the boarder of not tolerable to tolerable. Well I could say it was just because we spent two and half hours in the car and then went to lowes and walked around. But I have been to Oklahoma City every weekend this month and haven't had this much soarness. I haven't taken a pregnancy test because every time I do one at home or at my parents it's always negative.  My period is not due until May 11th. My daughter has been pushing on my belly tonight. And then last weekend she's been bending over in front of my husband.and my sister in law said that is how she found out that she was pregnant with her first son and her grandma was the one that told her that. What do I do?