Help with symptoms?25w

Tina
Hi ladies:
I am 25 weeks and I have two newish symptoms that I plan to discuss with doctor but wanted to know if you can relate and what your doctors have said:
1.) I get the feeling I can't breathe or rather am not getting enough air. Usually this is when I am sitting-- like at a restaurant or at my desk at work. It's like I am breathing through a straw and sometimes I start to panic and get lightheaded. 
2) over the last week or so I have had this pelvic pain/ soreness. Like if you had an intense stretch the day before or you rode a horse all day. But I obviously haven't. Sometimes the tension and pain around the crotch and between the thighs and hips is so bad it's hard to walk. I think it may be round ligament but anyone want to contribute?