Spotting but no flow 😔

My hubby and me are trying to conceive baby #2 but so far it's just been to complicated. We stop trying so much. We haven't been really using condoms because we want to get pregnant. My expected period was supposed to show up on the 14th of February and it's now the 16th and I've been spotting on and off brownish in color and at times like a pinkish color. But no actual flow. Could this be implantation bleeding? I think it might be because of stress but idk 😕 I did start cramping a little yesterday but it was mild cramping and it eventually went away. My breasts have been feeling slightly heavier and fuller. Been feeling bloated and tired. Also very moody. But that's how I get when I get my period to at times lol plz no rude comments. I'm feeling frustrated and confused.