Hi everyone, I'm posting this message because I need good non-judgemental advice, honest opinions and I know you all are great at both: 

My SO and I are trying to have a baby, but I had WLS last summer and had some horrible complications happen after which landed me in hospital for 2 months. I've been losing weight at a pretty good rate, but because of the size I was before my AF didn't come regularly. I still want to know the following:

1. When the best time to try and conceive is? (Because my AF has been known to not to come around for months between each other) 

2. When or how long after should I wait to try/do a pregnancy test? 

3. Does a woman sometimes spot for a few days if a fertilized egg starts embedding in the wall of the uterus? 

4. What are some of the best pregnancy tests, how much and where do I find them? 

All extra advice is appreciated as well. Thank you for reading, hopefully commenting if you can help with any or all of my questions and have a GREAT day/night.