plan b consequences?

So on January 20th I took Plan b and just a week before I took it I had gotten off my period. So, it's been about four days and I've been spotting. I like putting tampons but it's not heavy enough for one cuz then it hurts to take it out so I've been using pads which sucks. That's beside the point. Anyways,  Should I consider it my period? I'm kinda scared it's something else that could possibly be wrong because the blood that's coming out is not as thick as normal, and it's kinda light but at the same time bright red.  every now and again some blood clots come out but they're small. Idk I'm just worried this is happening so soon after getting my period. Any advice or thoughts would greatly be appreciated 😵😪