I’m scared I have PPD 😔😔

My son is almost 5 months old and I love him more than anything in this world! This last week has been crazy though it’s like I am having these random feelings or like pure rage. Like I’ll just be sitting there and I feel like I’m going to go crazy! The thing is, it’s not every day. There are good days and bad days but the bad days are really bad and I just feel like I am so angry for no good reason! It scares me how mad I get sometimes! I was also in the military and was diagnosed with severe PTSD and I have been doing pretty good with handling it the last year and a half since getting out but my flag backs and stuff seem to be getting worse when I get in my “dark place” I’m so scared that this won’t get better 😥 I need some advice/opinions and encouragement 🙏🏽