Confused

If anyone is up for it, I need some brains lol because mine is all over the place.

I was reading online, and a lot of websites were saying it’s almost impossible to fall pregnant before 3 months pp? Is this true? I bloody hope so!!!

(I AM EBF, ON DEMAND my son eats 5-10minutes max AND HAVE NOT HAD A CYCLE YET. I also stopped bleeding 2 weeks Postpartum.)

I had unprotected sex on the 15th of February; which put me at 7 weeks postpartum. 12 days afterwards I had light spotting for 3 days.

I tested 2, and then 3 weeks afterwards. Both negative. This last week I have just had crazy bloating. And the last 3 days I have been having PMS cramps. My body just feels so off. I’m confused.

With my last pregnancy, I got a positive test exactly 4 weeks after my last period. It was very faint and took a few days after that to get darker. Is it possible I could be pregnant? It has now been over 4 weeks since I had sex. And I haven’t tested again, since 3 weeks after I had sex. Should I test? Or am I safe?