Help me please

Me and my husband have been married 2 and half years we have very high sex drives and we love to do oral but since being pregnant with my little boy 2 years ago I have struggled to give him a blow job and he also seems to keep getting bigger he was 8 and a half before but now he seem a lot more and I don't understand why and also I tried to give him a bj from soft he got very hard very quick and it made me gag and be nearly sick it also takes him a very long time to cum approx 2 hours is the shortest its took via a bj and his full on sex quickys are like 1-2hours is there something wrong with me he said he's never been able to cum quick any way but I feel useless because I couldn't f inish what I started xxx please help me xx