Post Natal Anxiety

Hi, this is my first reach for help since having my baby four months ago. I've just recently realised that my anxiety levels are sky rocketing. My baby is waking up every 2 hours during the night and I think sleep deprivation is the major factor, hence why I haven't sought help yet! But I've been staying awake fretting even when he is asleep, loosing hours crying and waking up in the morning upset and worried about the day to come. I have been avoiding intimacy with my partner and it's starting to effect our relationship. I feel intense guilt in wanting time to myself (we are currently living with partners parents and it's driving me up the wall not being able to just be grumpy for a day or have my own space to be a mum). I feel there are so many reasons why I feel this way and I can't fix any of them. Even when there is a solution to one problem my anxiety spreads onto another issue and I can't escape the cycle. Any help of understanding is much appreciated xx