36 day cycle - need help.

Cortney • Army wife. Wrestling mom. Dog lover to a boxer.
Okay I am TTC for my second and having issues- I am new to testing for ovulation as of this month. 
Normally my cycle is about 36 days, and lasts about 7 days. 
In December it came a week early and only lasted 1 medium flow day and 2 spotting days. 
Right after AF ended I tested my ovulation kit for the first time - my line was super dark just about as dark as the control line- I am 3 days out of ovulation according to Glow but my lines are all most invisible especially compared to the lines directly after my AF.
I am constantly nauseous, very exhausted but get spurts of energy. I have been having back pain for the past two days and I'm looking for answers. 
I have done multiple HCG home tests which came out either evap line, negative, or invalid and today I did a blood test at the hospital but have not gotten my results. 
Just looking for anyone who has any advice.