Is there more than what she said?

So last summer I was gone for four months and a lot happened over the summer here at home. But me and this girl were dating for six months before hand and I had to leave for BCT, but before I left we've had plenty of sex and I usually go down on her, so i know a lot about what it's like down there. Anyways, when I return back home she taste different, and smells different and has become loose. I don't really know if loosen has anything to do with sex, I'm pretty sure it starts to tighten back up shortly after sex. But I'm just a little concerned because she was going to the gym while I was gone, so the tightness of her vagina shouldn't have changed right? She also was doing drugs and drinking a lot while i was away, which brings me to more worry. She told me about two incidents, both she said she was only given oral, one by a girl and another time a gay guy that i know gave her oral. Which she hid the gay guy situation from me for a little while. Both incidents involved drugs and alcohol. But what i am asking is did she do more or am i just way over thinking, too many rumors have hit my ears and I really just need some help here. I will throw in more details with answers that come, if needed.