Need Advice

Elizabeth • BFP on 4/10/17 for baby #2 ❤️ [Baby #1 = Jan 2016]
I'm soo confused about what's been going on w me:
- Took IUD out Feb 1st
- Had bleeding for 2 days (2 days after it was removed)
- I have taken OPKs and have had LH surge 2x
- My BBT is ALL over the place
- It's been 37 days since that initial bleeding 
- Before my IUD I was a VERY regular 28 day cycle
Is this normal?? Why did I have LH in my system if I never got a period? Any and all advice welcome!