My Daughter Has Bruises

Hello, about 4 -5 weeks ago my 5 year old had a small scratch on her side where her jeans stopped. She said they were too tight (they're the type of kid's jeans that have the belt on the inside you can pull to tighten them).

A week ago this appeared on her arm. It initially looked like a bug bite. I emailed her teacher with this photo

and asked if my daughter had been grabbed or something and she said no. She saw it and asked where it came from and my daughter also told her teacher it was a bug bite. It started to clear up a couple of days later. No problem.

TONIGHT is a whole other issue. While bathing (I'll admit, I mainly allow her to take showers. I've taught her how to clean all over so I do not hoover over her). Tonight she wanted to soak in a bath and my 2 year old wanted to join. When she got undressed I immediately noticed these. Please excuse the photos I did my best to edit.

There are several more that I didn't realize have my other daughter in the background so I will not post those. I started crying as soon as I saw them and just hugged her. I asked her what happened and she said her legs have been really itchy. I haven't seen her scratch more than usual (time of year, cold, dry skin to be expected). She said the marks don't hurt and I couldn't help but continue to cry. I just hugged her and held her. I calmly asked if anyone has touched her vagina (we don't use nicknames over here) and she said no. I explained to her what I meant and she still said no. I asked again what happened and she said her legs have just been itchy. The marks aren't anywhere else. I am making her an appointment for first thing tomorrow morning but I can't help but fucking worry. I don't leave my kids with just anyone and she's mainly at school, daycare (after school),and home. Of course I don't abuse my kids.

Anyone know what this might be? In person they look like welts and you can see the scratch lines but in the photos they look like bruises. I'm scared something serious is going on (maybe she's ill or something) and I can't focus!! I probably shouldn't have panicked the way I did because she almost began to cry too but this is my baby. I talked to her calmly and asked the same question in different ways I could think of and she keeps saying no one has touched her. I was sexually abused as a child and I'm TERRIFIED. I nevet leave my kids with anyone for that reason (my own trauma).

Please help. Any advice?

Edit1: I can't stop shaking you guys. I feel like I want to throw up. I'm scared something more is wrong and she doesn't know how to tell me. I hear her saying her legs are itchy but the abused little girl in me is flipping the fuck out right now! I put a couple of anti itch creams on her and she says is feels much better but I can't wrap my head around that being it.

Edit2: Thank you all for your helpful advice. I will admit, I don't appreciate being told I need to see a doctor too because of my past trauma. I've been to therapy for my trauma. Not that it should matter and I am not projecting my past on to my child and I never said I did not trust her. Much of the emotion I'm pouring out has been into this post. Yes, I cried in front of her but I calmed myself down and spoke to her in a way she could understand best! Yes, My mind immediately went to abuse because it took me YEARSSSSS to come out about what happened to me and who did it. So of course I have every right to worry and freak out. Gosh, I just wanted helpful advice on other things that might cause that. Not being "talked" to like I'm crazy.

Edit3: I haven't had an opportunity to read through the other comments. First, I'm sorry I sounded a bit bitchy in my previous edit. I was EXTREMELY emotional and not thinking clearly. I wasn't projecting my trauma on my child (I called my previous therapist and she explained) I was triggered. So I was balancing that and wanting to make sure I stayed on top of this issue. I've taken her to the doctor and they don't know why she has these marks. I explained that the one on her arm has come and gone a couple of times, thinking it was a bug bite I put cortisone cream on it and left it alone. She's starting to get them everywhere. In the interim of a dermatology appointment I've been using an eczema cream with a red top. I can't think of the name off top of my head right now. She says she feels fine but it worried about the marks everywhere. I'm hoping we will have some answers very very soon.