odd cycle, could i be preg?

hello everyone, I've had a really weird month and just need some advice/opinions. Me and DH have been TTC for a little over 2 years now. I had a normal cycle from 2/6/18 to 2/11/18. On 3/5/18 I started spotted I thought it was my normal cycle but it only lasted until 3/7/18. I started having some very light cramps about 8-10 days later and if the spotting was a period I should be due in 4-5 days. The cramping is still going its very light and off and on but I usually end up with a headache and backache throughout the day as well. I'm usually very dry about a week before my cycle but I'm having very watery discharge and some that's white and sticky? Anybody have any ideas?