Early pregnancy symptoms?!?!

Kaitlyn • TTC since Oct 2013, never imagined that it would be so difficult!
My period is 2 days late, I've taken 2 hpt, both BFN! Took one in morning and one later in day. Have extreme nausea and heartburn. Some cramping, but not like I get before AF...CF is "school glue" in consistency...,trying not to freak put but we've been TTC for 7 months now ....anyone else have these symptoms before? Will keep taking hpt, but may call MD to get blood test