Have a question about Progesterone supplements

So I’m in the middle of my first IUI cycle. I’m at day 11. Since about day 8 or 9 after the actual procedure, I’ve had this bad back pain between my shoulders. I read that it happens to pregnant women in the first trimester and later as your breast get larger. I’m already pretty healthy in that department. I am taking progesterone 200mg twice a day vaginally and I have notice for the past two to three days but breast feel heavy. I haven’t noticed them being bigger but I’ve searched and searched and it seems like the progesterone can cause breast swelling but I’m not taking about bloating. I wore a bra I normally wore before the IUI and I was SPILLING out of the top! So I opted for a sports bra today and it is strapped but supportive. I have indents on my shoulders from just today after about 8 hours in it. So again, I know progesterone can cause breast swelling or as I’ve read the appearance of fullness and heaviness in the breast but can it cause like actual heaviness? I don’t want to count my chickens and be let down when I have my bloodwork. Is this a normal symptom of the hormone? Or should I maybe alert my clinic?