Last weeks of PCT... Erection problems

I'm 24 and just coming off my first cycle of test prop, 10 weeks at 400mg/week. My plan for PCT was as follows:

Clomid: 100/50/50/25/25
Nolva: 20/20/20/20/20

HCG was run throughout the cycle at 250iu e3d along with aromasin at 12.5mg ED

My first 3 weeks of PCT were great. My balls felt full and I was getting mad hard ons without an issue. Since entering my 4th week and lowering the clomid to 25mg I've had trouble getting it up and when I do it's really weak and I'm experiencing some shrinkage too. I've tried cialis a couple of times but it really didn't do anything for me. All my stuff is pharm grade so I know quality isn't the issue.

Is this normal for most people? I was assuming that I would have minimal libido at the start of PCT then have it increase but instead it's the opposite. Is there anything I can do or add that can change things around?

Cheers.