Ok, so...
Five weeks into hrt.
Week three started with discomfort in my nipples. I was not expecting this for quite some time. Fast forward to week five. I hurt so much. It's a good ache, don't get me wrong, but it is constant. I am now afraid of breasts growing too quick. I will get my Tria in a few weeks, but honestly,  I thought that I had more time.

The question is, has this happened to anyone else? If so, how did you cope?

I am very happy, I am just trying to run to catch up. Normal tops don't work for me anymore. Mom is in the hospital, so I saw my entire family today. Everyone commented on my, very obvious, erect nipples. Most of them know, but the comments are so rude.

How do I cover this up, and will they always be pointing the way?

It pays to wear a loose shirt over the top of a tight tee or single, that usually takes care of the perky nips.

That does the trick, thank you.

I started with breast buds and soreness on day 5, and I also found I had good luck with a snug (but not painfully tight) sports bra under a T-shirt and then a loose shirt over it. For super-pointy nipples only, a lightly padded bra will also help, or "nipple petals"; there are cis women with that issue, so there's products out there intended to deal with it.

(My usual warning is that if growth starts early and fast, be prepared to have a backup plan re: coming out. I had to move up coming out at work when I was in danger of being outed by my breasts despite my best efforts at concealment - I was a 42C at four months.)

Jenna Marie, C's in four months you were off to the races quickly.   Many girls never get to C's in their entire life.

Yeah mine are growing fast. I actually have cleavage and I can't seem to wear anything without them showing. I did have a bit of gynecomastia from before though.

Yeah a loose shirt will be fine
The tria and other HPL systems work good I have the Silk N Go personally it DOES work but it does take time as with all hair removal treatments.

Nipples come fast for many people. Breast buds shortly after.

I am getting some rather large boobs fast. D in 12 months! Eeeeep! I am a rare case but it can happen. That said, I have only had one stranger comment about my boobs whilst in guy mode.

When I started with hrt.. I also had nipple soreness within 3 days and had breast buds soon after that... i was an A cup by the end of month 1.

I would wear a padded sports bra, with a loose fitting t-shirt... the padded bra will help protect your growing girls... you don't want to bump them

Mine grew far quicker than Anticipated, so I had to really change my plans around for being full time. I mean I don't think I could really conceal them too well at this point. A tank with a sports bra and a loose shirt over it worked for a bit. Now even in something loose like a hoody it is kinda apparent I have breasts I am about 10 months into hormones iirc.