Exhausted during the first trimester!

This is my second pregnany and there a few things that worry me. I’m only 11 weeks and I feel super exhausted when I exercise (I’ve been going to the gym for 4-5 months now). I start to feel light headed and my ear start to hurt like my head will explode. This only around 30 mins to an hour of exercising or cleaning. Another thing is my belly is quite big for 11 weeks and my face is slightly swollen too. I’m not sure if this is because it’s my second time around or because of the other syptoms I’m feeling.

I see my doctor on the 8th of this month but I was wondering if this is something I should worry about?