Confused..

If anyone is willing to answer please do . Ok so I'm 25 weeks + 2 days according to my last period which I seriously do believe was in February.. BUT ! I usually have extremely heavy and painful periods that last about a full week but on February 1st this "period" was a different.. It was lighter and didn't hurt one bit and in all honesty didn't even last long . It was weird. Well it was on March 4th that I found out I was some where between 4-5 weeks pregnant.. so does that mean February wasn't really a period but much rather implantation bleeding? & if that's the case am I farther along than 25 weeks? Oh gosh I am really confusing lol