Hun keep doing Combat just modify...seriously you are fit enough. I was doing Combat up untill 36 weeks and Pump till 38 the key word is MODIFY!!

Combat - No jump kicks lol, no jump knees, level one, if you need to walk don't shuffle. Umm...thinking...in the new one don't do the switch shuffle (step, kick, foot down turn and walk back...it'll make sense when you do it), march don't skip or cross jack, in the Muay Thai (current release) take out the bounce in the step over cross...and do NOT do the conditioning track on your toes, infact i'd say stay away from the hovers all together and just go to the loo lol.

Why don't you do Pump?

I would say that Les Mills classes are waaaay safer for pregnant women than classes like circuit. The freestyle classes are put together by the instructor (who may well be great) but LM classes go through a LOT of different levels of safety via Drs and other professionals. The instructors are trained in what to look for in a pregnant participant. I can let you know the options for Pump too if ya like xx

Unlitmately it's your decision but speaking from my own experience, my body bouced back so much quicker after DD2 and thats because of my fitness.

Also be careful when stretching as you're probably hyper flexible too x