Ectopic pregnancy????

I had sex on December 10, took a plan b the 12th and bled the 17th which was early bleeding bc my period wasn’t supposed to come for another week and a half. I hadn’t bled since and just had spotting through the month of January. Last week of January I stopped spotting and decided to take 4 different pregnancy tests the first week of February. They all came out negative, so i went to take a pee test at a clinic to be sure, which came out negative as well, (keep in mind no bleeding has occurred since December). They told me that just cus the tests were negative does not mean I’m not pregnant, it just means I may either have an ectopic pregnancy or my HCG levels are too low. It’s February, I should have high levels of HCG and symptoms of an ectopic pregnancy by now. What could be going on?? The man who got me pregnant is no longer in my life so idk what to do at this point. 😞