Possible sexual assault?

I was baby sat when I was young, maybe 3-4 by a women who had older boys. The older I get, the more I am remembering things that went on. I remember this boy coming into the bathroom with me when I was getting dressed for school and touching my hair and telling me I'm pretty. I specifically remember the day cause it was picture day and my dad bought me a cute outfit. I keep getting more and more disturbed by this cause I am remembering more. I looked up this guys background check, which he's probably in his 30's and he has multiple rape and child porn charges. 
Next I remember being at my moms house in Th basement with a boy who  I now remember him telling me to take his pants off. This is all I remember as of now. It's weird. My mom was a drug addict so we would have all kind of weirdos running around. These thoughts are bothering me cause I feel as if more had happened. I struggle with depression, extreme OCD and social anxiety disorder. 
Should I seek out a therapist? Or is this my crazy mind trying to make things up?!

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