Emotional trauma

I need your ladies help ... something happened a couple months ago . I lost my senior dog I had for 14-15 years . I had to put him down he was sick and had heart worms... it was the most traumatic thing and first actual thing I cared a lot about . My parents are a different story... I really lost myself and sought out and started to explore different religions ect...met the person that I didn’t know very well and he just emotionally and sexually manipulated me ... not going in much detail but I confronted my fiancé of 5 years and he seems okay that I told him but it has really been stressful for me ... not that I waited to tell my fiancé. I don’t feel guilt for that it’s the whole situation and what happned and after losing my senior dog . I take responsibility of being so stupid but I am trying to start this year off right .,,finally have enough confidence in myself to start working on my self . Me and my fiancé’s struggle for 5 years is just how much I am insecure and how many problems it has made . I’m working on myself more this . ... I got on antidepressants for the second time since we’ve had our son of 3 years. It’s been still very hard mental health hasn’t been very good healthy . I don’t open up to many people and I’m not quite sure a therapist is good for me ? Please ladies I need your opinions...