Feel pregnant, negative tests

I️ have four children, so you think I’d be able to figure this out by now, but HELP.

I’m still nursing my 9-month old, and so far since her birth, I️’ve had one period. I️t started Jan. 17. Usually when my period starts up again after a baby, they are regular each month from then on. But now here I️ am, a couple weeks late, and I️ have no idea if I’m pregnant or just regulating out.

I️ thought for sure I️ was pregnant, because I️’ve been having tons of creamy white and egg-whitey cervical mucus. I’ve been having pinching and cramps in my lower abdomen and back. I️ took a test at home, and I️t was negative.

Opinions?