A support network is important. I found having no family nearby that it really sorted out the true friends and people who actually cared about me. That in itself is liberating.
Think about joining some antenatal groups, whether it be pregnancy yoga or an nct antenatal group. Its good to have someone going through stuff at the same time! You may not make best friends but it is nice to have mummy acquaintences (well i like it anyway). Hope it all works out for you!
Of course you can do it on your own! In fact with such an unsupportive and unreliable ex i would sere it as a positive thing that you know where you stand from the beginning. Do you have support from family and friends?
So this might be long winded and pointless but I'm feeling the need to get it all written down. My ex and I were together for 2 and a half years. It was a fiery relationship and ended after one too many fights. During the relationship I was told that due to some health issues it was likely I would have trouble conceiving, but was put on the coil to relieve symptoms. So anyway my ex and I were still "seeing" eachother off and on. I found out a few weeks ago I was pregnant. Informed my ex who has told me he wants nothing to do with me or the child as he has a new relationship on the go. Now I'm scared. I have a good job, a car and my own flat with a great support system of family and friends and I love and want this baby. Am I being selfish/ridiculous to think I can do this on my own?