It's been a couple wks since you asked your question. Sorry, I'm a little behind but catching up. I have a feeling that at this point, you're feeling the full effects of the tren. Your dosing is just fine, BTW. 75mg tren is plenty to get a great effect, but yes, it will take about 2-3 wks to kick in. That doesn't mean you will look different at wk 3, but you will start to look different, assuming the diet and cardio is right. And around 2-3 wks in, i would think that strength is better. So like I said, I'm sure you have everything sorted out now.
But I do have something important to say. If you are doing every other day shots, you are going to mess yourself up if you only inject in the delts. You are going to need to use more sites or you will get bad scar tissue at the very least. Over time, you will eventually have a hard time even sticking the needle into the muscle. It will make awful cracking and popping sounds as the needle tears through the scar tissue. It will make it harder to push oil in and eventually, the oil won't be able to absorb properly because of the scar tissue. It will sit in the muscle and casue an infection. This could happen a few cycles down the road. It could happen in this one. Rotate your sites. Use each one no more than 1x wk. I would at least rotate in glutes