What's the deal???

This is one of those stupid pregnancy scare posts. I appreciate if you decide to read and comment anyways.

So this started in the beginning of May. I missed birth control pill in April, had withdrawal sex. But then I had a weirdly light period.

I freaked out. Took a lot of tests all month long in May. All neg. got another period. Tested again, negative. Got ANOTHER period after being put on Nexplanon a month ago. Got a quantitative blood test, showed less than 1 hcg count.

However I'm feeling this odd twitching/kicking in my lower belly. Sometimes I feel the spasms in my upper belly but more around my lower belly.

I've also had a lot of discharge.

It's making me nervous. Why am I having these weird symptoms?